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Long-Term Stability of the Wechsler Intelligence Scale for Children-Third Edition
Long-term stability of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III; D. Wechsler. 1991) was investigated with a sample of 667 students from 33 Slates twice evaluated for
ADHD and Achievement
TLDR
A meta-analysis of the published literature since 1990 to determine the magnitude of achievement problems associated with attention-deficit/hyperactivity disorder and the impact of moderator variables on ADHD and achievement found student ratings were as predictive as parent ratings.
Interobserver Agreement in Behavioral Research: Importance and Calculation
Behavioral researchers have developed a sophisticated methodology to evaluate behavioral change which is dependent upon accurate measurement of behavior. Direct observation of behavior has
Orthogonal higher order structure of the Wechsler Intelligence Scale For Children--fourth edition.
  • M. Watkins
  • Psychology, Medicine
    Psychological assessment
  • 1 March 2006
TLDR
According to J. B. Carroll's (1993) 3-stratum theory, performance on any subtest reflects a mixture of both 2nd-order and 1st-order factors, so interpretation of the WISC-IV should not discount the strong general factor.
Exploratory Factor Analysis: A Guide to Best Practice
Exploratory factor analysis (EFA) is a multivariate statistical method that has become a fundamental tool in the development and validation of psychological theories and measurements. However,
Determining Parallel Analysis Criteria
Exploratory factor analysis is an important analytic tool for investigating test validity. Of all the decisions made in exploratory factor analysis, determining the number of factors to extract is
Structure of the Wechsler Intelligence Scale for Children--Fourth Edition among a national sample of referred students.
  • M. Watkins
  • Psychology, Medicine
    Psychological assessment
  • 1 December 2010
TLDR
Recommendations favoring interpretation of the 1st-order factor scores over the general intelligence score appear to be misguided.
Long-Term Stability of Children's Attitudes Toward Reading
The long-term stability of the construct of children's attitudes toward reading was examined. One hundred eighty-nine students in Grades 1-4 completed two administrations of the Elementary Reading
ADHD and college students: exploratory and confirmatory factor structures with student and parent data.
TLDR
EFA uncovered and CFA confirmed 3 distinct and reliable dimensions for student reports: Inattention, Hyperactivity, and Impulsivity, and EFA uncovered a reliable 2-dimension structure for the parent-report data.
The reliability of multidimensional neuropsychological measures: from alpha to omega
  • M. Watkins
  • Psychology, Medicine
    The Clinical neuropsychologist
  • 21 April 2017
TLDR
It was concluded that neuropsychologists should base their clinical decisions on reliable scores as indexed by coefficient omega, and the WAIS-IV FSIQ score can be interpreted as a reliable measure of general intelligence.
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