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Rice, Mabel L.; Zubrick, Stephen R.; Taylor, Catherine L.; Hoffman, Lesa; Gayán, Javier – Journal of Speech, Language, and Hearing Research, 2018
Purpose: This study investigates the heritability of language, speech, and nonverbal cognitive development of twins at 4 and 6 years of age. Possible confounding effects of twinning and zygosity, evident at 2 years, were investigated among other possible predictors of outcomes. Method: The population-based twin sample included 627 twin pairs and 1…
Descriptors: Longitudinal Studies, Genetics, Twins, Cognitive Development
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Hildenbrand, Claudia; Niklas, Frank; Cohrssen, Caroline; Tayler, Collette – Journal of Early Childhood Research, 2017
This study investigated the relationship between children's attendance at different types of early childhood education and care programmes and their mathematical and verbal skills. Analyses of data from 1314 children participating in an Australian longitudinal study, the E4Kids project, revealed no relationship between children's verbal ability…
Descriptors: Foreign Countries, Early Childhood Education, Preschool Children, Kindergarten
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Reckase, Mark D.; Xu, Jing-Ru – Educational and Psychological Measurement, 2015
How to compute and report subscores for a test that was originally designed for reporting scores on a unidimensional scale has been a topic of interest in recent years. In the research reported here, we describe an application of multidimensional item response theory to identify a subscore structure in a test designed for reporting results using a…
Descriptors: English, Language Skills, English Language Learners, Scores