Kaplan-ch.10-B&W - Validity Correlates highly with...

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Chapter 10 The Wechsler Intelligence Scales: WAIS, WISC, WPPSI
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Wechsler-Bellevue (1939) Later became the WAIS Addressed limitations of the Stanford- Binet Testing adults Emphasis on speed Verbal emphasis
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Major contributions of the Wechsler-Bellevue Point scale grouped by content scores for content areas Performance scale These were later adopted by the Standford-Binet.
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WAIS Revisions / improvements Comprised of verbal subtests & performance subtests Resulting scores: Full-scale IQ Verbal IQ Performance IQ Index scores – groupings of subtests Subtest scores
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Interpretation Verbal-performance comparison If big difference, why? Caution, ethnic differences Pattern analysis Subscale scores Caution, inconsistent findings Indicates what can be further investigated using other sources of information.
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Psychometric properties – WAIS-III Large, stratified standardization sample Reliability Full-scale = .95-.98 Lower for subtests
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Unformatted text preview: Validity Correlates highly with other forms of the Wechsler (WAIS-R, WISC-III) Older theoretical basis (WISC & WPPSI based on more modern theory) Versions for children 2 tests, mostly parallel WISC-IV ages 6 to 16, 11 mon. WPPSI-III ages 2.5 to 7, 3 mon. WISC & WPPSI Innovations in newer versions: Stronger theoretical basis i.e., fluid reasoning, working memory, processing speed Information on special groups for clinical use Techniques to produce best performance i.e., teaching items, prompts / queries In development, statistical techniques to identify and reduce bias in items (in addition to use of judges) Psychometric properties WISC-IV Reliability: full-scale = .97 (a little lower with test-retest) lower for subtests Validity: Broad support (factor analysis, correlation with other tests, cross-cultural, etc.) WPPSI-III Similar to WISC-IV...
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This note was uploaded on 02/13/2012 for the course PSY 4610 taught by Professor Szabo during the Spring '11 term at Middle Tennessee State University.

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Kaplan-ch.10-B&W - Validity Correlates highly with...

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