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Direct linkBrock, Jon; Jarrold, Christopher; Farran, Emily K.; Laws, Glynis; Riby, Deborah M. – Clinical Linguistics & Phonetics, 2007
The comparison of cognitive and linguistic skills in individuals with developmental disorders is fraught with methodological and psychometric difficulties. In this paper, we illustrate some of these issues by comparing the receptive vocabulary knowledge and non-verbal reasoning abilities of 41 children with Williams syndrome, a genetic disorder in…
Descriptors: Developmental Disabilities, Vocabulary Skills, Receptive Language, Cognitive Ability
Download full textLewis, Joan D.; DeCamp-Fritson, Stephanie S.; Ramage, Jean C.; McFarland, Max A.; Archwamety, Teara – Multicultural Education, 2007
The purpose of this study was to compare the effectiveness of the Raven's Standard Progressive Matrices, the Naglieri Nonverbal Abilities Test (NNAT), and the Iowa Test of Basic Skills (ITBS) in selecting for ethnically diverse students who may be gifted. The participants of the study were 175 students enrolled in Grades 3-5 and Grade 8 in a…
Descriptors: Gifted, Elementary Education, Nonverbal Ability, Test Validity
