Psychometric qualities of a tetrad WAIS-III short form for use in individuals with mild to borderline intellectual disability.
OBJECTIVE
To investigate the reliability and validity of a Wechsler Abbreviated Scale of Intelligence-based Wechsler Adult Intelligence Scale - third edition (WAIS-III) short form (SF) in a sample of individuals with mild to borderline intellectual disability (MBID) (N = 117; M(IQ) = 71.34; SD(IQ) = 8.00, range: 52-85).


METHODS
A full WAIS-III was administered as a standard procedure in the diagnostic process.


RESULTS
The results indicate an excellent reliability (r = 0.96) and a strong, positive correlation with the full WAIS-III (r = 0.89). The SF correctly identified ID in general and the correct IQ category more specifically in the majority of cases (97.4% and 86.3% of cases, respectively). In addition, 82.1% of the full scale IQ (FSIQ) estimates fell within the 95% confidence interval of the original score.


CONCLUSIONS
We conclude that the SF is a reliable and valid measure to estimate FSIQ. It can be used in clinical and research settings when global estimates of intelligence are sufficient.
a Behavioural Science Institute, Radboud University Nijmegen , Nijmegen , The Netherlands and.
Neomi
N
van Duijvenbode
a Behavioural Science Institute, Radboud University Nijmegen , Nijmegen , The Netherlands and.|b Trajectum , Zwolle , The Netherlands.
Robert
R
Didden
b Trajectum , Zwolle , The Netherlands.
Teunis
T
van den Hazel
a Behavioural Science Institute, Radboud University Nijmegen , Nijmegen , The Netherlands and.
Rutger C M E
RC
Engels
D000328:Adult; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D014888:Wechsler Scales
Intelligence; WAIS-III; mild to borderline intellectual disability; psychometrics; short form