In lexical development, the specificity of phonological representations is important. The ability to build phonologically specific lexical representations predicts the number of words a child knows (vocabulary breadth), but it is not clear if it also fosters how well words are known (vocabulary depth). Sixty-six children were studied in…

The relationships between phonological awareness, rapid naming, short term verbal memory, letter knowledge, visual skills and word reading in kindergarten, and the predictive patterns from kindergarten to first grade were examined in 41 Chinese-Dutch bilingual children living in the Netherlands in both their first language (Chinese) and second…

In the present study we investigated experimentation abilities of children with learning problems in early childhood education, i.e. kindergarten (4-6 years old). An essential part of science education is learning via the scientific method, of which experimentation is the central component. We studied experimentation abilities in 28 kindergartners…

The goal of this longitudinal study was to examine how lexical quality predicts the emergence of literacy abilities in 169 Dutch kindergarten children before formal reading instruction has started. At the beginning of the school year, a battery of precursor measures associated with lexical quality was related to the emergence of letter knowledge…

Research Findings: The present study compared effects of explicit instruction on and practice with the phonological form of words (form-focused instruction) versus explicit instruction on and practice with the meaning of words (meaning-focused instruction). Instruction was given via interactive storybook reading in the kindergarten classroom of…

The current study used a dyadic and coconstructive approach to examine how to embed exercises that support executive functioning into early literacy instruction to empower its effects. Using a randomized controlled trial design with 100 children, we examined the effects of dyadic activities in which children scaffolded each other's learning and…

A dynamic assessment tool was developed and validated using Mokken scale analysis to assess the extent to which kindergartners are able to construct unconfounded experiments, an essential part of scientific reasoning. Scientific reasoning is one of the learning processes happening within science education. A commonly used, hands-on,…

We examined the effects of adaptive word retrieval intervention on a classroom vocabulary program on children's vocabulary acquisition in kindergarten. In the experimental condition, word retrieval was provided in a classroom vocabulary program, combining implicit and explicit vocabulary instructions. Children performed extra word retrieval…

The present longitudinal study aimed to investigate the development of word decoding skills during incremental phonics instruction in Dutch as a transparent orthography. A representative sample of 973 Dutch children in the first grade (M[subscript age] = 6;1, SD = 0;5) was exposed to incremental subsets of Dutch grapheme-phoneme correspondences…

We investigated effects of listening to single or multiple storybook readings versus testing with and without feedback on children's breadth (i.e., the number of words) and depth (i.e., the quality of word knowledge) of vocabulary learning. Kindergartners (n = 125) were divided into 3 intervention and 1 control conditions. Children in the control…

A dialogic storybook-based intervention integrating dialogic storybook reading with early literacy activities is studied with a longitudinal quasi-experimental study design. The effects of this intervention, in addition to a regular early childhood education (ECE) program, on kindergartners' vocabulary and phonological awareness development are…

How do children use phonological knowledge about spoken language in acquiring literacy? Phonological precursors of literacy include phonological awareness, speech decoding skill, and lexical specificity (i.e., the richness of phonological representations in the mental lexicon). An intervention study investigated whether early literacy skills can…

This study focused on the precursors of spelling difficulties in first grade for children with specific language impairment (SLI). A sample of 58 second-year kindergartners in the Netherlands was followed until the end of first grade. Linguistic, phonological, orthographic, letter knowledge, memory, and nonverbal-reasoning skills were considered…

The direct, transfer and retention effects of a repeated reading intervention study of single CVC (consonant in the onset and a vowel and consonant in the rime) words in kindergartners with partial letter knowledge were examined. A total of 26 second-year kindergartners participated in this study. Participants were divided over two feedback…

We investigated the sustained effects of explicit versus implicit instruction on the breadth and depth of children's vocabularies, while taking their general vocabulary and verbal short-term memory into account. Two experimental groups with 12 and 15 kindergarten children respectively learned two sets of 17 words counterbalanced to be taught first…