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Direct linkNigg, Joel T.; Lewis, Kara; Edinger, Tracy; Falk, Michael – Journal of the American Academy of Child & Adolescent Psychiatry, 2012
Objective: The role of diet and of food colors in attention-deficit/hyperactivity disorder (ADHD) or its symptoms warrants updated quantitative meta-analysis, in light of recent divergent policy in Europe and the United States. Method: Studies were identified through a literature search using the PubMed, Cochrane Library, and PsycNET databases…
Descriptors: Attention Deficit Hyperactivity Disorder, Effect Size, Psychometrics, Dietetics
McLeod, Bryce D.; Weisz, John R. – Journal of Consulting and Clinical Psychology, 2004
The major youth psychotherapy meta-analyses have relied on published studies, which may have led to biased effect size estimates. To examine this possibility, the authors compared 121 dissertations with 134 published studies and found the following: (a) few differences on individual methodological variables, but, overall, stronger methodology in…
Descriptors: Psychotherapy, Integrity, Doctoral Dissertations, Effect Size
Download full textFuchs, Douglas; Fuchs, Lynn S. – 1985
This article presents a meta-analysis of the effects of examiner familiarity/unfamiliarity on children's performance during individual testing. Data came from 22 controlled studies involving 1489 subjects. In a typical study, the effect of examiner familiarity raised test performance by .35 standard deviations. Differential performance favoring…
Descriptors: Context Effect, Disabilities, Effect Size, Examiners
Mottron, Laurent – Journal of Autism and Developmental Disorders, 2004
A meta-analysis was performed on the 133 cognitive and behavioral papers in autism using comparison groups in the 1999-2002 period. High-functioning (average IQ: 84.7), adolescents (average, 14.4 years) are largely dominant. IQ is the most frequent matching variable in use (51.2%). The instruments that are most frequently used to determine IQ or…
Descriptors: Measurement Techniques, Intelligence Quotient, Asperger Syndrome, Autism
