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Wechsler Abbreviated Scale of Intelligence (WASI)

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Amanda Zago

on 12 May 2014

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Transcript of Wechsler Abbreviated Scale of Intelligence (WASI)

Wechsler Abbreviated Scale of Intelligence (WASI)
Subtests
Vocabulary
- Measures knowledge of words and verbal concept formation
Similarities
- Measures verbal concept formation and reasoning

These two combine to measure verbal-crystallized abilities (VIQ)

Block design
- Measures the ability to analyze and synthesize abstract visual stimuli
Matrix reasoning
- Measures fluid intelligence, classification and spatial ability, broad visual intelligence, knowledge of part-whole relationships, simultaneous processing, and perceptual organization

These two combine to measure nonverbal-fluid abilities (PIQ)
Reliability
Introduction
Individually administered intelligence test
Abridged version of Wechsler Adult Intelligence Scale (WAIS)
Introduced in 1999
Intended for individuals between the ages of 6 and 89
Consists of four subtests:
1. Vocabulary
2. Block Design
3. Similarities
4. Matrix Reasoning
Validity
Advantages
Amanda Zago
Test-Retest
Subtests ranged from .83 to .91.
Significant results.
Internal Consistency
Demonstrated by the high and low alphas.
Convergent Validity- the degree to which two measures of constructs that should be related are in fact related.
Demonstrated by correlation of WASI coefficients to Wide Range Intelligence Test (WRIT) coefficients.
M=100
SD=15
Convergent validity is also indicated by higher correlations between similar subtests.
Disadvantages
Ease of use
Broad age range
Different forms
Linkage
Parallels
Some sacrifice of clinical accuracy
Not comprehensive
Benefits of Abbreviated Measures
Basic WAIS-IV kit=$2000. Basic WASI-II kit=$230.
"The demands of research protocols and managed care environments have imposed time constraints on psychological testing resulting in efforts to develop abbreviated forms of well-established psychometric measures." (Meyer, 2000)
Incremental validity
Valid assessment that saves time and money
Extremely useful for practitioners
References
Stano, J. F. (2004). Test Review: Wechsler Abbreviated Scale of Intelligence. Rehabilitation Counseling Bulletin, 48(1), 56-57.
doi:10.1177/00343552040480010801
Canivez, G. L., Konold, T. R., Collins, J. M., & Wilson, G. (2009). Construct validity of the Wechsler Abbreviated Scale of
Intelligence and Wide Range Intelligence Test: Convergent and structural validity. School Psychology Quarterly, 24(4), 252-265. doi:10.1037/a0018030
Abu-Hilal, M. M., Al-Baili, M. A., Sartawi, A., Abdel-Fattah, F., & Al-Qaryouti, I. A. (2011). Psychometric properties of the
Wechsler Abbreviated Scale of Intelligence (WASI) with an Arab sample of school students. Individual Differences Research, 9(4), 219-230.
Irby, S. M., & Floyd, R. G. (2013). Review of 'Wechsler Abbreviated Scale of Intelligence, Second Edition'. Canadian Journal Of
School Psychology, 28(3), 295-299. doi:10.1177/0829573513493982
McCrimmon, A. W., & Smith, A. D. (2013). Review of 'Wechsler Abbreviated Scale of Intelligence, Second Edition (WASI-II)'.
Journal Of Psychoeducational Assessment, 31(3), 337-341.
Psychological Corp. (1999). Wechsler Abbreviated Scale of Intelligence Manual. San Antonio, TX: Author.
Meyer, M. (2000). Use of Wechsler Abbreviated Scale of Intelligence in a vocational rehabilitation sample. http://
www.ohiolink.edu/etd/view.cgi?ucin976036571, 23/12/2002.
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