TITLE:
Development and Reliability of the Indonesian Wechsler Adult Intelligence Scale—Fourth Edition (WAIS-IV)
AUTHORS:
Christiany Suwartono, Magdalena S. Halim, Lidia L. Hidajat, Marc P. H. Hendriks, Roy P. C. Kessels
KEYWORDS:
Intelligence, Assessment, Item Analysis, Reliability
JOURNAL NAME:
Psychology,
Vol.5 No.14,
September
30,
2014
ABSTRACT: Through
the years, several translated versions of Wechsler’s intelligence test have
been used in Indonesia, in clinical, educational or industrial settings.
However, instruments such as Wechsler-Bellevue Intelligence Scale are outdated,
have not been validated and lack proper normative data, resulting in measurement
errors and invalid decisions made on the intellectual potential of individuals.
The primary aim of this study was to adapt and validate the Wechsler Adult
Intelligence Scale—fourth edition (WAIS-IV) for use in Indonesia. We described the
first phase in the adaptation of the WAIS-IV in the Indonesian language,
including translation, item analysis, and reliability of the subtests. The
sample of this research consisted of 148 healthy participants who are representative
for the Indonesian population with respect to gender, age groups (ages 16 to
83), educational levels, and ethnic background. Results showed that the
sequence of the US WAIS-IV cannot be applied in Indonesia due to differences in
index difficulties. Cronbach’s coefficient alphas for the WAIS-IV subtests
ranged from .74 - .92. For the subtests from the Verbal Comprehension Index,
the inter-rater agreement ranged between .91 - .97. In all, the adaptation of
the WAIS-IV for Indonesia is psychometrically promising.