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Hoekstra, Rosa A.; Vinkhuyzen, Anna A. E.; Wheelwright, Sally; Bartels, Meike; Boomsma, Dorret I.; Baron-Cohen, Simon; Posthuma, Danielle; van der Sluis, Sophie – Journal of Autism and Developmental Disorders, 2011
This study reports on the development and validation of an abridged version of the 50-item Autism-Spectrum Quotient (AQ), a self-report measure of autistic traits. We aimed to reduce the number of items whilst retaining high validity and a meaningful factor structure. The item reduction procedure was performed on data from 1,263 Dutch students and…
Descriptors: Autism, Factor Structure, Foreign Countries, Pervasive Developmental Disorders
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MacArthur, Charles A.; Konold, Timothy R.; Glutting, Joseph J.; Alamprese, Judith A. – Journal of Learning Disabilities, 2010
The purposes of this study were to investigate the reliability and construct validity of measures of reading component skills with a sample of adult basic education (ABE) learners, including both native and nonnative English speakers, and to describe the performance of those learners on the measures. Investigation of measures of reading components…
Descriptors: Learning Disabilities, Construct Validity, Validity, Adult Basic Education
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Wang, Shudong; Wang, Ning; Hoadley, David – International Journal of Testing, 2007
This study used confirmatory factor analysis (CFA) to examine the comparability of the National Nurse Aide Assessment Program (NNAAP[TM]) test scores across language and administration condition groups for calibration and validation samples that were randomly drawn from the same population. Fit statistics supported both the calibration and…
Descriptors: Factor Structure, Factor Analysis, Construct Validity, Scores