Psychometric properties of the Serbian version of the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) | Zendy

Ljiljana B. Lazarević | Zendy; Goran Knežević | Zendy; Marija Mitić | Zendy; Dragana Djuric-Jocic | Zendy

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Psychometric properties of the Serbian version of the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV)

Author(s) -

Ljiljana B. Lazarević,

Goran Knežević,

Marija Mitić,

Dragana Djuric-Jocic

Publication year - 2018

Publication title -

psihologija

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.222

H-Index - 16

eISSN - 1451-9283

pISSN - 0048-5705

DOI - 10.2298/psi171001001l

Subject(s) - wechsler adult intelligence scale , psychology , wechsler preschool and primary scale of intelligence , wechsler intelligence scale for children , item response theory , developmental psychology , classical test theory , intelligence quotient , intellectual ability , psychometrics , borderline intellectual functioning , clinical psychology , population , cognition , psychiatry , medicine , environmental health

The Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) is an individually administered clinical instrument designed for assessment of intellectual abilities of adolescents and adults. The WAIS-IV consists of 15 subtests (10 core and 5 supplemental) reflecting the efficacy of cognitive functioning in four domains (verbal comprehension-VCI, perceptual reasoning-PRI, working memory-WMI, and processing speed-PSI), and general intellectual ability (Full-Scale IQ-FSIQ). The WAIS-IV was administered to a sample of 262 respondents - specifically, 104 respondents from sample representative for the wider Belgrade area, 62 schizophrenic, 63 depressive, and 33 patients with intellectual disability. Psychometric properties of WAIS-IV subtests were analysed within the frameworks Item Response Theory (IRT) and Classical Test Theory (CTT). Results show that IRT reliability of subtests ranges from .86 (Comprehension and Picture Completion) to .95 (Cancellation), while the IRT reliability of the FSIQ is .94. Overall, all subtests discriminate participants well along the whole continuum of intellectual abilities. The WAIS-IV enables highly reliable assessment of intellectual abilities on Serbian population.

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