We discuss an original study and two replications conducted over 18 years examining the impact of Teacher Study Group (TSG) in Vocabulary, a professional development (PD) approach for improving pedagogy and student learning. Study 1 focused on the design and development of the PD and included a small-scale randomized controlled trial to assess the…

Spatial language and ability play important roles in children's cognitive development. Spatial ability in kindergarten predicts achievement in reading, math, science, and technology in primary school and therefore constitutes an important skill set in preparation for school entrance. Good spatial thinking skills are required for learning in…

Early and explicit vocabulary instruction is one important way teachers can support early readers for later reading comprehension success (Duncan et al., 2007; Marulis & Neuman, 2010; Neuman & Dwyer, 2011; National Institute of Child Health and Human Development (NICHD), 2000); however, some observations indicate that early childhood and…

Numerous studies have examined the positive and negative effects of various types of interactions that occur while children view electronic book (e-book) stories. However, the effects of the different types of interactions have not been compared, and more importantly, the optimal amount and reoccurrence of these interactions on children has not…

Purpose: This study compares responses of children who are deaf and hard of hearing (DHH) who use spoken language with responses of children who have typical hearing on a repeated word association task to evaluate lexical-semantic organization. Method: This study included 109 participants in early kindergarten or who had completed first grade. The…

This qualitative case study examined the contribution a year-long professional development in the science of reading had on 10 first-grade teachers' knowledge of how reading develops and their instructional practices. Data for this research study was collected through a longitudinal interview process, from pre- and post-knowledge inventory…

Longitudinal models of individual growth typically emphasize between-person predictors of change but ignore how growth may vary "within" persons because each person contributes only one point at each time to the model. In contrast, modeling growth with multi-item assessments allows evaluation of how relative item performance may shift…

Longitudinal models typically emphasize between-person predictors of change but ignore how growth varies "within" persons because each person contributes only one data point at each time. In contrast, modeling growth with multi-item assessments allows evaluation of how relative item performance may shift over time. While traditionally…

Programs that engage young children in movement and song to help them learn are popular but experimental evidence on their impact is sparse. We use an RCT to evaluate the effectiveness of Big Word Club (BWC), a classroom program that uses music and dance videos for 3-5 minutes per day to increase vocabulary. We conducted a field experiment with…

This transnational comparative study between Costa Rica and the United States provides an in-depth understanding of the similarities and differences of the early literacy practices of educators in the Pre-Kindergarten to Kindergarten classroom settings. Drawing upon Costa Rica's curricular approach to Early Childhood Education, based upon the…

Examining changes in the longitudinal relationship between vocabulary knowledge and three types of morphological awareness (MA), a cross-lagged design was conducted with a sample of 146 Chinese children. Homophone awareness, homograph awareness, compounding awareness, and vocabulary knowledge were measured in grades 1 (T1), 2 (T2), and 3 (T3),…

The purpose of this study was to examine the effects of a rich vocabulary intervention on the comprehension and vocabulary learning of third-grade students with language learning disorders (LLD). The study used a repeated acquisition design (RAD), a single case design involving the repeated delivery of a vocabulary intervention on different sets…

Interactive book reading (IBR) as a context for vocabulary learning is studied widely in preschool children and kindergarteners. In the present study, we elaborate on this prior research by investigating the effects of a five-week IBR intervention on first graders' expressive target vocabulary growth. A repeated measures design with two…

Background: Prominent theories of reading make the prediction that individual differences in children's word learning capacity determine the pace of their acquisition of reading skill. Despite the developmental nature of some of these theories, most empirical research to date has explored the relation between word learning capacity and reading at…

Parental education and child gender are related to learning and development during childhood and adolescence. The present study investigated the role of mother's education level and child gender for children's vocabulary and math skills in Norway. Children's vocabulary and math skills were assessed in Early Childhood Education and Care (ECEC)…