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ERIC ED599355: Impact of a Parent Text Messaging Program on Pre-Kindergarteners' Literacy Development PDF

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833339 research-article20192019 EROXXX10.1177/2332858419833339Cabell et al.Impact of Pre-K Parent Texting Program AERA Open January-March 2019, Vol. 5, No. 1, pp. 1 –16 DOI: 10.1177/2332858419833339 https://doi.org/10.1177/2332858419833339 Article reuse guidelines: sagepub.com/journals-permissions © The Author(s) 2019. http://journals.sagepub.com/home/ero Impact of a Parent Text Messaging Program on Pre-Kindergarteners’ Literacy Development Sonia Q. Cabell Florida State University Tricia A. Zucker University of Texas Health Science Center at Houston Jamie DeCoster University of Virginia Stefanie B. Copp University of Lynchburg Susan Landry University of Texas Health Science Center at Houston There is increasing interest in low-cost, scalable approaches that support parent engagement in their children’s learning at home. This study examined the impact of one such approach on pre-kindergarteners’ literacy development during an aca- demic year in a suburban public school setting that prioritized enrollment for children living in poverty. Parents were ran- domly assigned within children’s classrooms to receive either: (a) a language and literacy text messaging program or (b) a health and well-being text messaging program. Unexpectedly, findings indicated that children entering the school year with higher skill levels benefited from the language/literacy program while those with lower initial skill levels benefited from the health/well-being program. Although this approach shows promise in impacting some children’s literacy skills, it is clear that “one size” does not fit all families and that some families may benefit from text messages on basic needs such as sleep, nutri- tion, health, and behavior. Keywords: preschool, pre-kindergarten, literacy, text messaging, scalable approaches Parent engagement in young children’s learning is critical pre-kindergarteners in home activities that support early lit- to children’s development of a host of foundational abilities eracy and language development. that impact later school success (Paratore, Cassano, & Schickedanz, 2011; Whitehurst & Lonigan, 1998). Yet Parent Engagement in parental involvement in learning varies greatly across many Children’s Literacy Learning factors, including socioeconomic status (SES; Henrich & Gadaire, 2008). A striking literacy gap is present between Children’s early literacy skills encompass their under- less and more economically advantaged children at pre-kin- standings about how books and print are organized, knowl- dergarten entry and tends to persist into the school-age years edge of letter names and sounds, early writing attempts, and (Chatterji, 2006). This gap can be explained in part by differ- sensitivity to the sound structure of spoken language (i.e., ences in parenting practices (Waldfogel & Washbrook, phonological awareness; Rhyner, Haebig, & West, 2009; 2011). Therefore, one approach to improving children’s lit- Whitehurst & Lonigan, 1998). Strong oral language skills are eracy skills is to improve parent engagement in learning at highly correlated with early literacy skills and are predictive home. Efficacious parent programs are often expensive of reading achievement (National Early Literacy Panel (Cates et al., 2018). Researchers recently have begun to [NELP], 2008); consequently, language is a key domain to investigate technologies as low-cost, scalable solutions for promote alongside early literacy skills. An extensive body of shifting parent engagement (e.g., York, Loeb, & Doss, 2018). research demonstrates that early home literacy activities pre- The present study examines the impact of a 25-week text dict children’s later reading and academic skills within pre- messaging program designed to engage parents of at-risk school and through the elementary grades (e.g., Burgess, Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). Cabell et al. Hecht, & Lonigan, 2002; M. A. Evans, Shaw, & Bell, 2000; Mol et al., 2008). It warrants noting that a group training Inoue, Georgiou, Parrila, & Kirby, 2018; Sénéchal & approach may be problematic in that it places a significant LeFevre, 2014; Tamis-LeMonda, Luo, McFadden, Bandel, & burden of preparation on facilitators, is often poorly attended, Vallotton, 2017). and often requires multiple sessions (Anthony et al., 2014). In this study, we focus on parent engagement in learning Other efforts use recording devices that analyze the frequency at home, a component of broader parent involvement frame- of parent-child conversations as a method to help parents works (Epstein, 1995; Epstein et al., 2019) that refers to reflect on ways to have more frequent and rich conversations parent-child interactions that reinforce formal learning at with their children (Gilkerson, Richards, & Topping, 2017; school as well as parents’ efforts to create a home environ- Suskind et al., 2016). The costs of these face-to-face pro- ment conducive to learning. Informal learning opportunities grams vary from $100 for group trainings to over $3,000 per occur in the home as well as during shopping, recreation, parent-child dyad; home visiting approaches cost signifi- and transportation or when visiting restaurants, libraries, or cantly more than methods that capitalize on after-school museums. Experts argue that to successfully prepare chil- workshops or waiting room visits (Cates et al., 2018; Knight dren for modern careers, we must take advantage of informal et al., 2016). In recent years, researchers and educators have learning contexts rather than focusing exclusively on formal begun to explore low-cost, technology-based approaches to learning within the rather limited hours of the school day support parents’ early literacy interactions with their children (Golinkoff & Hirsh-Pasek, 2016). Various national programs such as online tools and mobile apps (e.g., Vroom; Galinsky, and policies seek to support informal learning such as the Bezos, McClelland, Carlson, & Zelazo, 2017). In the present federally funded Head Start program, which emphasizes the study, we examined the extent to which a low-cost parent text importance of parental involvement broadly as well as par- messaging program, delivering messages three times per ent engagement in learning at home more specifically week over the course of 25 weeks, impacted pre-kindergar- (National Center for Families Learning, 2014; Zuckerman & teners’ literacy development. Khandekar, 2010). A national evaluation of Head Start found that centers that facilitated parent involvement increased the Parent Text Messaging Programs frequency of home learning activities and enhanced aca- demic and behavioral outcomes for children (Ansari & Text messaging is a seemingly ubiquitous mode of com- Gershoff, 2016). munication worldwide, with approximately 13,000,000 texts sent every minute (Domo, 2018). The use of text messaging for communication transcends age and socioeconomic sta- Intensity and Costs of Parent tus; in fact, text messaging is the most widely used smart- Engagement Interventions phone feature (Neilson, 2013; Pew Research Center, 2015). Evidence shows that parents can support early literacy Brief text messages could empower parents with informa- development by engaging their children in activities such as tion to incrementally change behaviors. Text messages may storybook reading, talking about letters and print, helping serve to focus parents’ attention on informal learning oppor- their child write, reciting songs or rhymes, and eliciting mul- tunities and nudge them toward more frequently engaging tiple-turn conversations during everyday activities (e.g., their children in desirable activities (Castleman, 2015). A Beals, De Temple, & Dickinson, 1994; Hindman, Skibbe, & number of randomized control trials provide evidence of the Foster, 2014; Jordan, Snow, & Porche, 2000; Puranik, benefits of text messaging interventions for positive adult Phillips, Lonigan & Gibson, 2018). Moreover, meta-analytic behaviors such as: weight reduction (Patrick et al., 2009), reviews provide causal evidence that parenting interventions smoking cessation (Rodgers et al., 2005), reduced alcohol can positively impact young children’s early literacy skills consumption (Muench et al., 2017), increased savings (Jeynes, 2012; Manz, Hughes, Barnabas, Bracaliello, & (Karlan, McConnell, Mullainathan, & Zinman, 2016), Ginsburg-Block, 2010; Mol, Bus, De Jong, & Smeets, 2008; improvements in physical activity (Fournier, d’Arripe- NELP, 2008; Reese, Sparks, & Leyva, 2010). Yet these inter- Longueville, & Radel, 2017), increased college attendance ventions vary greatly in their intensity and costs. Several pro- (Castleman & Page, 2015), and higher rates of child vacci- grams improve home literacy and language development nation (Stockwell et al., 2012). Of highest relevance to the with home visits from coaches (e.g., Brown & Lee, 2017; present study is a small but growing literature on using text Hammer & Sawyer, 2016; Landry et al., 2017) or approaches messages to engage parents in their children’s literacy learn- that coach parents within pediatric waiting rooms (Cates ing (e.g., Doss, Fahle, York, & Loeb, 2018; Kraft & Monti- et al., 2018). A common and effective approach to supporting Nussbaum, 2018; Kraft & Rogers, 2015; York et al., 2018). home literacy is through group trainings, often offered within Although it is doubtful that a text messaging program can be schools, in which parents learn how to effectively read books a panacea for closing the achievement gap, there is some with their children (e.g., Anthony, Williams, Zhang, Landry, promising evidence indicating that this approach warrants & Dunkelberger, 2014; Hackworth et al., 2017; Jeynes, 2012; further investigation. 2 Impact of Pre-K Parent Texting Program Several studies of parent text messaging programs show parents, (b) a tip message that provided specific activities impacts on children’s academic outcomes. A four-week that could be completed within the context of existing family experimental study found that when teachers communicated routines (e.g., bath time), and (c) a growth message that pro- to high schoolers’ parents through individualized weekly vided parents encouragement and a follow-up activity. Text one-sentence messages (via text, email, or phone, depending topics were structured as a spiral curriculum, starting simply on preference) about students’ strengths and weaknesses, but becoming more complex over time, with some skills significantly more students earned summer course credit revisited throughout the year. During the first cohort of the (Kraft & Rogers, 2015). Exploratory analyses indicated that program, parents assigned to the treatment condition impacts were due to the actionable nature of the messages received language and literacy text messages that focused on (i.e., highlighting what students need to improve) as well as skills such as alphabet knowledge, phonological awareness, the influence of the text messages on the content of parent- vocabulary, parent-child conversations, and book-reading child conversations. Another study found a text messaging routines. These participants also received messages that pro- program that promoted summer reading for elementary stu- moted parent involvement at school (e.g., Ask your teacher dents improved reading comprehension for third- and fourth- about . . .) and explicitly linked to the district’s Raising a grade children but not first and second graders (Kraft & Reader program, which sent home books to children on a Monti-Nussbaum, 2018). These text messages also provided regular basis. In the second cohort of the program, parents parents with actionable tips to engage students in reading assigned to the treatment condition received math (e.g., over the summer months, such as taking turns reading aloud. counting, shapes, patterns, number recognition) and social- A third study examined a parent text messaging program that emotional text messages (e.g., identifying emotions, emo- provided parents of kindergarten children with activities that tion regulation, sharing, turn-taking) in addition to the were both personalized (i.e., explaining their child’s under- language and literacy texts. The control group in both standing of particular literacy skills) and differentiated (i.e., cohorts received a text message every two weeks about the providing activities tailored to each child’s literacy level; school district’s vaccination requirements or kindergarten Doss et al., 2018). This program resulted in higher child enrollment process. Curiously, findings indicated that the reading levels, but impacts were more pronounced for stu- intervention had a significant main effect on children’s lit- dents entering the year with relatively low or relatively high eracy outcomes only in the second cohort, when fewer liter- skills. Interestingly, this study included a treated comparison acy-related text messages were sent. Further analyses group who received generic literacy texts, but these text indicated that the effects across both cohorts seemed to messages did not appear to impact children’s literacy skills. depend on children’s level of skill at baseline; that is, chil- Although emerging research suggests promise for parent dren entering pre-k with a lower skill level appeared to ben- text messaging with elementary-age students (Doss et al., efit from the program. While York et al.’s (2018) study 2018), the present study focuses on slightly younger pre- demonstrated evidence of promise for increasing young kindergarten children because the pre-kindergarten year may children’s literacy skills, further research is needed to under- represent a pivotal juncture for engaging parents in their stand whether language/literacy text message topics alone child’s learning. Pre-kindergarten marks a major transition are sufficient to improve children’s literacy skills. for most families as they prepare for their child’s move to elementary school, which typically requires identifying a Purpose of This Study new school program and preparation to ensure the child is “ready” for school. During this transition to formal school- The purpose of the present text messaging study was to ing, families may be more open to new influences in ways extend the work by York et al. (2018) in a different context that affect the child’s school trajectory (Rimm-Kauffman & (i.e., suburban vs. urban), with a higher quantity of action- Pianta, 2000). While text messaging has been used as part of able text messages, and with a more robust treated compari- broader interventions with parents of preschoolers (e.g., son group that received an equal number of text messages. used as reminders; Mayer, Kalil, Oreopoulos, & Gallegos, Specifically, all of our literacy text messages were action- 2015), we identified only one study that specifically exam- able (rather than informational only) in that they provided ined the impact of text messages designed to improve par- parents with an activity and sample script. In addition, we ent-child interactions on preschoolers’ academic outcomes. developed an equal number of text messages for the com- York and colleagues (2018) implemented an 8-month text parison group to ensure effects were not due to differences in messaging intervention called Ready4K! in the San Francisco intensity alone. In an effort to make all text messages useful Unified School District in two cohorts during the 2013–2014 to parents, the comparison group was provided with infor- and 2015–2016 school years. Over 900 parents of 4-year-olds mation about non–literacy related topics (e.g., sleep habits, were randomly assigned within each of 34 sites to receive the nutrition, safety, behavior). In an era where parents may be intervention. These parents received three text messages per increasingly exposed to educational text messages from week: (a) a fact message to provide information and motivate many public sources, it is important to contrast a literacy text 3 Cabell et al. messaging program with another educational text messaging Demographic or test data were not provided from the district program as the latter may more realistically represent “busi- for one child, so our final analysis sample was 174 children, ness as usual” practices. with parents of 87 randomly assigned to each condition. Over Our research questions were two-fold: half of the children were female (53.4%), and most were Caucasian (66.7%) or African American (21.3%), with 5.2% Research Question 1: What are the effects of a language Hispanic. We did not find any evidence that the treatment or and literacy text messaging program contrasted with a comparison groups differed on either child demographics or health/well-being text messaging program on literacy baseline literacy skills. Table 1 presents the baseline study outcomes of pre-k children enrolled in a suburban variables by condition and for the full sample. public school setting targeting enrollment for children living in poverty? General Procedure Research Question 2: Did these effects depend on chil- Parents were provided the opportunity to participate by dren’s level of initial literacy skill? classroom teachers who were informed of the program through a district meeting with the first author. Text mes- We hypothesized that there would be a significant positive sages were delivered for a period of 25 weeks (November effect of the literacy text messaging program on children’s 2015–April 2016) by the research team via the Signal Vine literacy skills. Despite York et al.’s (2018) prior findings that platform, and teachers did not have access to the messages children with lower initial skills seemed to benefit most nor were they aware of which parents were randomly from the program, we did not have a directional hypothesis assigned to treatment and comparison conditions. Teachers about the second research question due to the larger pre- individually administered a battery of literacy assessments school intervention literature that reports inconsistent evi- to students as per their usual practices prior to and after the dence of differential effects (e.g., Cabell et al., 2011; intervention period during 2-week windows established by Hindman, Connor, Jewkes, & Morrison, 2008). the school district. Method Intervention Design Research Design and Participants Treatment condition. The treatment condition consisted of This randomized controlled trial examined the impact of text messages that focused on providing suggestions for par- a text messaging parent program on children’s literacy skill ent-child interactions to enhance children’s language and development. Data were collected in a single suburban literacy development. The program was 25 weeks in length, school district in a mid-Atlantic state that prioritized public with 23 weeks focused on specific content. Each week fea- school pre-k enrollment for children deemed at risk for later tured three text messages—delivered Monday, Wednesday, academic difficulty who were not served by Head Start (i.e., and Friday—on a specific topic (e.g., expanding on child family income at or below 200% of federal poverty guide- talk, encouraging name writing) that was embedded within lines, homelessness, parents were school dropouts, family broader categories for language and literacy domains. These income less than 350% of poverty for students with disabili- categories were explicitly listed at the beginning of each text ties). Within each classroom, half of the parents were ran- message. Language categories included: Discuss Books, domly assigned to receive language and literacy text Talk & Listen, Tell Stories, and Ask Questions. Literacy cat- messages (treatment), whereas the other half received text egories included: Teach Letters, Listen for Sounds, Rhyme, messages on alternate topics addressing children’s health Word Play, and Write. Language and literacy categories and well-being, including safety, exercise, behavior, and rotated, and topics were generally sequenced to increase in nutrition (comparison). By conducting random assignment complexity over time. For example, phonological awareness within each classroom, we controlled for classroom influ- activities increased in difficulty over time; parents were first ences such as classroom instructional quality. This study was encouraged to have children generally listen for sounds not preregistered. (week 5), then play rhyming games (weeks 7 and 13), and Participants included 177 parents (mostly mothers) and later move to blending syllables (week 15) and identifying their 4-year-old children (M = 53.95 months, SD = 3.74) in beginning sounds in words (week 19). 13 pre-k classrooms across seven schools (range = 7−18 par- The text messaging program also included other features ticipating students per classroom). In six instances, children in addition to the tips to enhance children’s language and had two separate households (i.e., mother and father) who literacy development. First, text messages were personalized asked that both receive text messages, so 174 different fami- to include the child’s name and gender (e.g., “Ask Joseph to lies were represented in the sample. In addition, there was close his eyes. Knock on a table. Say, ‘Can you guess what one instance where a parent had two children in a single makes that sound?’ Try different sounds.”). Second, each classroom, so we randomly selected one child for analysis. text message was purposefully actionable, most containing 4 TABLE 1 Descriptive Statistics by Condition for Baseline Study Variables Mean (SD) or Count (%) Comparison Treatment Overall Test for Variable (n = 87) (n = 87) (N = 174) Treatment Effect Child characteristics Gender, n (%) χ2(1) = .21 Male 39 (44.8) 42 (48.3) 81 (46.6) p = .65 Female 48 (55.2) 45 (51.7) 93 (53.4) Race, n (%) χ2(3) = .72 White 59 (67.8) 57 (65.5) 116 (66.7) p = .87 Black 17 (19.5) 20 (23.0) 37 (21.3) Hispanic 4 (4.6) 5 (5.7) 9 (5.2) Other 7 (8.0) 5 (5.7) 12 (6.9) Age in months, M (SD) 53.94 (4.00) 53.97 (3.49) 53.95 (3.74) t(152) = –.06 p = .95 Fall scores on Phonological Awareness Literacy Screening tasks (maximum), M (SD) Print and Word Awareness (10) 4.76 (2.89) 5.09 (3.12) 4.92 (3.00) t = −0.69 p = .49 Upper-Case Alphabet Recognition (26) 9.31 (8.35) 10.58 (9.21) 9.94 (8.78) t = −0.90 p = .37 Lower-Case Alphabet Recognition (26)a 8.16 (8.21) 9.73 (8.53) 8.96 (8.37) t = −1.04 p = .30 Letter Sounds (26)b 3.64 (5.67) 3.13 (4.28) 3.38 (4.99) t = 0.55 p = .58 Nursery Rhyme Awareness (10) 5.1 (2.47) 4.71 (2.86) 4.91 (2.67) t = 0.91 p = .36 Rhyme Awareness (10) 4.26 (2.42) 4.2 (2.52) 4.23 (2.46) t = 0.15 p = .88 Beginning Sound Awareness (10) 3.74 (3.69) 3.83 (3.78) 3.79 (3.72) t = −0.14 p = .89 Name Writing (7) 4.24 (1.85) 4.28 (2.19) 4.26 (2.02) t = −0.10 p = .92 aStudents are administered Lower-Case Alphabet Recognition when they score at least 16 on the Upper-Case Alphabet Recognition task. bStudents are administered Letter Sounds when they score at least 9 on the Lower-Case Alphabet Recognition task. an example of what a parent might say (e.g., “Touch each generally provided when parents responded (either yes or letter as we name them together.”). This decision was based no) to the fourth message of the week, asking them whether on prior focus groups conducted by our research team during they had time to do a suggested activity during the week. See the development phase of the program as well as research the online Supplemental Material for a full set of treatment reporting that specific text messages appeared to be more group text messages. beneficial than general ones (York & Loeb, 2014). Third, the initial text message each week usually included information Comparison condition. Parents in the comparison condition about the importance of the week’s topic (e.g., “Reading received an equivalent number of health and well-being text with Sarah Grace builds your relationship,” “Talking with messages throughout the 25-week period. These messages Todd can make him smarter,” “Singing can help Kristin were delivered on the same schedule as the treatment condi- learn rhyming words.”). Fourth, parents were periodically tion messages, three times per week (Monday, Wednesday, provided with reinforcement regarding their important role Friday), with a fourth message asking whether they had in their children’s development (e.g., “You are your child’s time to promote a healthy habit or whether the information most important teacher!”). This kind of feedback was was useful. Similar to the treatment condition, the week’s 5 Cabell et al. messages stayed on a single topic (e.g., healthy drinks) early writing skills. We are unable to publish the raw data within a broader category (e.g., nutrition). Categories from this study because we did not receive district permis- included: Nutrition, Sleep Habits, Health, Wellness, Exer- sion to archive the data. cise, Behavior, Safety, Self-Confidence, Sharing, Transi- tions, Chores, and Bedwetting. These messages were also Print knowledge. Specific print knowledge skills were personalized to include child name and gender (e.g., “Set a assessed, including print-concept knowledge and alpha- good example by serving healthy foods that you like or eat- bet knowledge. To measure print-concept knowledge, ing something new so Tamara sees you enjoying what you teachers administered the Print and Word Awareness task, are asking her to eat.”). Feedback was provided to parents which involves teachers sharing a book with a child and after they answered the fourth message and discussed the asking him or her to identify particular components, importance of the parent’s role in promoting healthy habits including the title, individual letters and words, and the and well-being. See the online Supplemental Material for a direction print moves on a page (maximum score = 10). full set of comparison group text messages. The PALS-PreK technical manual reports an internal con- sistency of .75 (Cronbach’s alpha) for this task. To mea- sure alphabet knowledge, teachers first administered the Intervention Fidelity Across Conditions Upper-Case Alphabet Recognition task. This task requires Parents across conditions were sent a fourth text mes- children to point to and say the name of the 26 upper-case sage per week (delivered on Friday) to which they were letters of the alphabet displayed in random order on a asked to respond. They were generally asked (a) whether single sheet of paper (maximum score = 26). Children they had the time to implement the activity (treatment who scored 16 or more on this task were administered the group) or promote healthy habits (comparison group) or (b) next task, Lower-Case Alphabet Recognition, which was whether the information was useful to them (comparison similar to the upper-case task expect with lower-case group only). In general, parents were responsive to the text forms (maximum score = 26). Children who scored 9 or messages across conditions. Seventy-six percent (76.4%) more on the lower-case task were administered the next of parents responded at least once during the intervention, task, Letter Sounds, which measured knowledge of con- and 58.6% of parents responded at least five times, provid- sonant sounds, short vowels, and a few digraphs (e.g., sh; ing some indication that text messages were received and maximum score = 26). The PALS-PreK technical manual implemented. Overall response rates per week ranged from reports an interrater reliability of .99 across upper- and 35% to 58%. Responses were overwhelmingly positive, lower-case tasks. with very few parents providing a response of not helpful or no (range per week = 1%–4%). Between treatment and Phonological awareness. Children’s awareness of the sound comparison conditions, there were no significant differ- structure of spoken language was assessed by examining ences on the number of parents responding to the text mes- children’s understanding of rhyme and beginning sounds. sages or the level of reported engagement with the content The Nursery Rhyme Awareness task is a cloze activity in of the text messages, with parents in the treatment and which children are asked to fill in the missing rhyming word comparison conditions providing an average of 11.78 in a line of a common nursery rhyme (e.g., Jack be nimble, (SD = 7.92) and 13.36 (SD = 7.95) yes responses, respec- Jack be quick. Jack jump over the candle_____.; maximum tively, across the 23-week program, t(136) = −1.05, p = .30. score = 10; Cronbach’s alpha = .77). The Rhyme Awareness Within the treatment condition, parents did not appear to task measures children’s ability to match a target picture to a favor language-focused or literacy-focused text messages, picture of a rhyming word from a series of three pictures reporting about 7 yes responses for both types of texts. (maximum score = 10; Cronbach’s alpha = .84). The Begin- During the course of the study, 14 treatment and 13 com- ning Sound Awareness task requires children to produce the parison parents requested that messages stopped being letter sound (or letter name) at the beginning of a spoken delivered, but they did not remove their children from the word illustrated on a picture card, with possible beginning study, and thus, these outcomes remained in our intent-to- sounds of /m/, /s/, and /b/. This task takes place in the context treat analyses. of a teacher-led picture sort, with three practice items serving as header cards (man, sock, bag) and cards being placed under appropriate headers. While teachers provide corrective feed- Measures back during this task, they score children’s first oral response Children’s literacy skills were measured using the English (maximum = 10; Cronbach’s alpha = .93). To avoid confu- version of the Phonological Awareness Literacy Screening sion, teachers are asked not to administer these latter two for Preschool (PALS-PreK; Invernizzi, Sullivan, Meier, & phonological awareness measures consecutively. The PALS- Swank, 2004). Specifically, teachers individually assessed PreK technical manual reports an interrater reliability of .99 children’s print knowledge, phonological awareness, and for all phonological awareness tasks. 6 TABLE 2 Main Effects of the Language and Literacy Text Messaging Program on Spring PALS Task Scores PALS Task β for Intervention Condition SE (β) p Partial d Print and Word Awareness −.062 .054 .25 −0.15 Upper-Case Alphabet Recognition −.104 .065 .11 −0.23 Lower-Case Alphabet Recognition −.120 .080 .13 −0.29 Letter Sounds −.038 .056 .50 −0.08 Nursery Rhyme Awareness −.100 .051 .05 −0.28 Rhyme Awareness −.117 .068 .08 −0.26 Beginning Sound Awareness −.069 .059 .24 −0.16 Name Writing −.141 .054 .009 −0.44 Partial d is calculated as the difference between the estimated marginal means for the intervention and control groups divided by the standard deviation of those in the control group. PALS = Phonological Awareness Literacy Screening. Early writing. Children’s early writing skills were measured development. Since the intervention was applied at the child with the PALS-PreK Name Writing task. A child is asked to level, all of our models are correspondingly run at the child draw a self-portrait and label it with his or her name. Scoring level. All predictive models were estimated using Mplus of the written name representation is based on a develop- version 8. Coefficients were obtained using full information mental continuum of orthographic knowledge that includes maximum likelihood estimation. This type of estimation writing with scribbles, letter-like forms, some letters, and accounts for missing data by using all available data for each finally all letters in one’s name (maximum score = 7; interrater case in estimating parameters to adjust for potential bias in reliability = .99). the estimates resulting from missing data and has been iden- tified as one of the optimal ways to handle missing data in education research (Peugh & Enders, 2004). To accommo- Results date for the nesting of children within classrooms, we took Missing Values Analysis advantage of Mplus’s ability to adjust the standard errors of our parameter estimates to account for within-classroom There were no missing values on any of the child demo- dependence using a sandwich estimator. graphic variables. Of the 174 children in the sample, a total of Our first set of analyses explored the effects of the lan- 147 children (84.5%) had complete data on all of the PALS guage and literacy text messaging program on gains in lit- tasks for both the fall and spring assessment windows. Twenty eracy task means. This relation was tested by predicting children (11.5%) had complete data in the fall but were miss- each spring PALS task score from a dummy code represent- ing all data in the spring. Six children (3.4%) were missing all ing the treatment condition (with the comparison condition data in the fall but had complete data in the spring. One child as the reference group), the standardized fall PALS task (0.6%) had complete data in the fall and was only missing score, a dummy code for child gender, a collection of data on the Beginning Sound Awareness task in the spring. dummy codes for child race, and child age. Each PALS task Tests of the bivariate relations of having complete data in the was examined in a separate model. Table 2 presents the fall and having complete data in the spring with condition, standardized coefficients for the main effect of the treat- child gender, child race, and child age were not significant (all ment condition in each of these models. The coefficients for ps > .16). Having missing data in the fall was not significantly the covariates were omitted from the table for the sake of related to PALS task scores in the spring (all ps > .25). Those parsimony but can be obtained from the authors. The vari- missing data in the spring had significantly lower scores on all ance estimate used when calculating the effect sizes is based alphabet knowledge tasks in the fall than those with complete only on those in the comparison condition to ensure that it data in the spring: Upper-Case Alphabet Recognition, t(9.15) is not influenced by the treatment. This is a standard prac- = −2.91, p = .02; Lower-Case Alphabet Recognition, t(6.06) = tice when calculating effect sizes in intervention studies. −4.55, p = .004; and Letter Sounds, t(15.61) = –3.95, p = .001. The results indicate that there were main effects of the Scores on other PALS tasks in the fall were not significantly intervention on children’s early writing (i.e., Name Writing related to having complete data in the spring (all ps > .05). task) and phonological awareness (i.e., Nursery Rhyme Awareness task) such that those in the treatment condition Main Effects of the Text Messaging Program showed less improvement than those in the comparison con- Our primary research aim was to examine the effect of dition. However, after applying the Benjamini-Hochberg a parent text messaging program on children’s literacy method to correct for multiple comparisons, a method less 7 Cabell et al. stringent than the traditional Bonferroni method, neither Discussion effect maintained significance (Benjamini & Hochberg, This study examined the effect of two contrasting parent 1995). However, for four of the eight PALS tasks, the nega- text messaging programs on the early literacy skills of pre- tive effect size was substantively meaningful (i.e., equal to kindergarten children. In the treatment condition, parents or greater than an absolute value of 0.25), in favor of the received texts that encouraged language and literacy interac- health and well-being text messaging program (i.e., lower- tions within the context of daily family routines. In the case alphabet knowledge task, rhyming tasks, and early treated comparison condition, parents received texts that writing task; What Works Clearinghouse, 2017). These are provided them with information on important developmen- small- to medium-sized effects according to the guidelines tal topics focusing on children’s health and well-being. of Cohen (1992). Unexpectedly, our pattern of results suggested that the com- parison condition had better literacy outcomes. This finding Treatment by Baseline Interactions was qualified by a significant interaction such that children Next, we tested the extent to which the effect of the inter- entering the school year with relatively higher skill levels vention might vary with the child’s pretest score. This rela- appeared to benefit from the language and literacy text mes- tion was tested by predicting each spring PALS task score saging program while children entering the school year with from a dummy code representing the treatment condition relatively lower skill level appeared to benefit from the (with the comparison condition as the reference group), the health and well-being text messaging program. standardized fall PALS task score, the product of the condi- Our results indicated that the health and well-being text tion dummy code and the standardized fall PALS task score, messaging program, when compared with the language and a dummy code for child gender, a collection of dummy literacy text messaging program, resulted in greater gains in codes for child race, and child age. Each PALS task was children’s literacy skills over the course of the pre-kinder- examined in a separate model. For the overall PALS fall garten year. This pattern of results, with meaningful effect score, 14.1% of the comparison group and 19.7% of the sizes across multiple measures (though nonsignificant), was intervention group were less than 1 SD below the mean, unexpected not only because of past positive findings whereas 16.7% of the comparison group and 21.1% of the reported by York et al. (2018) for a similar language and intervention group were more than 1 SD above the mean. literacy–focused text messaging program encouraging This suggests that our extreme groups were sufficiently parent-child interactions but also because other targeted pre- large in both conditions to justify the use of the pretest kindergarten academic programs generally result in aca- scores as moderators. demic improvement in contrast to programs addressing the Table 3 presents the standardized coefficients for the social-emotional skills and well-being of children only main effect of the treatment condition in each of these (Morris, Millenky, Raver, & Jones, 2013). However, upon models. The coefficients for the demographics were omit- close consideration, we noted this finding is somewhat con- ted from the table for the sake of parsimony but can be sistent with York and colleagues’ reported finding for the obtained from the authors. After applying the Benjamini- study’s first cohort. In this cohort, parents received language Hochberg correction, we observed significant interaction and literacy messages comparable to our set of messages, effects for Print and Word Awareness, Nursery Rhyme with results indicating an overall negative, though nonsig- Awareness, and Rhyme Awareness tasks, which are all nificant, effect in favor of the control condition, which illustrated in Figure 1. In all cases, children with relatively received placebo text messages every few weeks about non- higher fall scores tended to perform better in the treatment related topics (e.g., immunization schedule). For their condition, whereas those with lower fall scores tended to study’s second cohort, York et al. reported some findings perform better in the comparison condition. The vertical favoring the treatment group when text messages included lines in the plots delineate the regions of significance literacy, mathematics, and social-emotional skills. However, (Preacher, Curran, & Bauer, 2006) such that group compari- these positive effects appeared on two literacy subtests of the sons at values of the fall score between the two lines are not PALS-PreK measure—the Letter Sounds and Lower-Case significant and group comparisons at values less than the Alphabet Recognition tasks—that were administered to only lower line or greater than the upper line are significant. high-performing participants because this measure includes Although the interaction for Letter Sounds was no longer a branching structure such that children who score below a significant after correcting for the Type I error rate (critical benchmark on easier subtests are not administered these value of .025), we explored this interaction and found the harder subtests. Thus, consideration of the findings reported same interaction pattern as the other three tasks. However, by York et al. should take into account this cautionary note unlike the other three tasks, the comparison between the regarding potential sample bias due to the administration treatment and comparison groups was not significant at any guidelines for these tasks of PALS-PreK. In situating our specific value of the fall score. results into the extant literature, it is important to note that 8 TABLE 3 Intervention by Fall PALS Score Interaction Effects on Spring PALS Task Scores PALS Task Predictor β SE (β) p Print and Word Awareness Fall score .323 .049 <.001 Condition −.063 .043 .15 Condition × Fall Score .180 .052 .001 Student age in fall .148 .060 .01 Female gender .088 .053 .10 African American race/ethnicity −.073 .076 .34 Hispanic race/ethnicity −.103 .086 .23 Other race/ethnicity .097 .047 .04 Upper-Case Alphabet Recognition Fall score .294 .069 <.001 Condition −.107 .063 .09 Condition × Fall Score .105 .088 .23 Student age in fall −.173 .076 .02 Female gender .066 .065 .31 African American race/ethnicity .043 .050 .39 Hispanic race/ethnicity −.150 .151 .321 Other race/ethnicity .035 .041 .399 Lower-Case Alphabet Recognition Fall score .273 .069 <.001 Condition −.113 .073 .12 Condition × Fall Score .166 .098 .09 Student age in fall −.083 .081 .30 Female gender .064 .063 .31 African American race/ethnicity .035 .045 .44 Hispanic race/ethnicity −.202 .186 .28 Other race/ethnicity .053 .053 .31 Letter Sounds Fall score .238 .086 .006 Condition −.035 .049 .48 Condition × Fall Score .133 .068 .05 Student age in fall −.026 .089 .77 Female gender .072 .056 .20 African American race/ethnicity .029 .045 .52 Hispanic race/ethnicity −.202 .133 .13 Other race/ethnicity .058 .055 .29 Nursery Rhyme Awareness Fall score .124 .116 .28 Condition −.104 .056 .06 Condition × Fall Score .315 .056 <.001 Student age in fall .073 .053 .17 Female gender .034 .090 .71 African American race/ethnicity −.006 .057 .91 Hispanic race/ethnicity −.202 .150 .19 Other race/ethnicity −.006 .077 .93 Rhyme Awareness Fall score .105 .032 .001 Condition −.114 .068 .09 Condition × Fall Score .184 .063 .003 Student age in fall .032 .057 .58 Female gender .019 .056 .74 African American race/ethnicity −.045 .079 .57 Hispanic race/ethnicity −.287 .138 .04 Other race/ethnicity −.069 .077 .38 (continued) 9 TABLE 3 (CONTINUED) PALS Task Predictor β SE (β) p Beginning Sound Awareness Fall score .241 .082 .003 Condition −.070 .055 .20 Condition × Fall Score .083 .088 .35 Student age in fall −.079 .083 .34 Female gender .079 .090 .38 African American race/ethnicity −.069 .052 .19 Hispanic race/ethnicity −.166 .124 .18 Other race/ethnicity .031 .043 .48 Name Writing Fall score .238 .069 .001 Condition −.140 .053 .008 Condition × Fall Score .131 .111 .24 Student age in fall −.104 .052 .05 Female gender .008 .110 .94 African American race/ethnicity .093 .103 .37 Hispanic race/ethnicity .106 .044 .02 Other race/ethnicity .076 .037 .04 PALS = Phonological Awareness Literacy Screening. York et al.’s study had a control group receiving placebo text behaviors if they perceived the program to be relevant to messages, while our study featured two contrasting text their needs and those of their children, and our findings sug- messaging programs. Findings may have differed had we gest that preschoolers’ health and well-being is a relevant, also included a third, placebo condition. foundational topic where families benefit from more Although our findings suggest that children with higher information. initial skill levels appeared to benefit more from the lan- We must ask why the two types of text messaging pro- guage and literacy–focused program, future research should grams in the present study appear differentially beneficial examine whether an optimal approach may combine aca- for children depending on their level of literacy skill upon demic topics with more basic information on positive par- entry into pre-kindergarten. There are several possible rea- enting strategies to support children’s health and behavior. sons for this result. First, as noted previously, the health/ Indeed, York et al. (2018) demonstrated some evidence of well-being text messaging program may have better matched promise in the more comprehensive text messaging pro- the needs of children in lower end of the skill distribution. gram, and the authors hypothesized that rotating the domains Second, children’s initial skill level could be serving as a of literacy, mathematics, and social-emotional skills may proxy for socioeconomic status (e.g., maternal education) have enabled parents and children to stay engaged with the even within this relatively low-income group (Cabell, program over the 8-month program period (see also Hurwitz, Justice, Logan, & Konold, 2013). Children living in poverty Lauricella, Hanson, Raden, & Wartella, 2015). Another pos- are more likely to suffer from a variety of risk factors, such sible explanation of both their findings and ours is that this as low-quality physical environments, inconsistent parenting, type of low-cost, technology-based support for informal lit- chronic stressors, poor nutrition, lack of sleep, and increased eracy learning is only efficacious when parents are informed behavioral issues (Adams, Hillman, & Gaydos, 1994; about and responding to the developmental needs of the Alaimo, Olson, & Frongillo, 2001; G. W. Evans, 2004; whole child rather than isolating literacy skills. The com- McLoyd, 1998). The health/well-being comparison text pro- parison text messages targeting children’s health and well- gram may have effectively nudged parents to attend to ways being may have been of higher relevance to some parents, to reduce stress, lack of sleep, or lack of exercise, which are particularly if their children struggled with attention or known to impair executive functions (Diamond, 2013; behavior due to lack of sleep and routines that parents might Lowe, Safati, & Hall, 2017; Ludyga, Gerber, Brand, have changed when texted information about positive par- Holsboer-Trachsler, & Pühse, 2016). In turn, increased enting strategies on such topics. Ideally, any successful text parental responsiveness to basic needs may have resulted in messaging program should provide parents with information better academic performance (Landry et al., 2012). For on evidence-based parenting strategies and thereby promote example, text messages focused on healthy sleep habits may a qualitative shift in parenting practices. It is likely that have resulted in better child ability to maintain attention parents would be more engaged and open to changing their or improved memory, which in turn enhanced literacy 10

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