The validity of the general ability measure for adults: comparison with WAIS-R IQ scores in a sample of college students with academic difficulties.
The present study investigated the validity of the General Ability Measure for Adults (GAMA) by comparing it to the WAIS-R using a sample of 80 college students reporting learning difficulties. Results indicated that the mean GAMA IQ score did not deviate significantly from the mean WAIS-R IQ scores. The GAMA Full Scale IQ correlated significantly with the WAIS-R PIQ, VIQ, and FSIQ scores. However, the obtained correlation coefficient for the GAMA and WAIS-R PIQ significantly differed from the observed correlation coefficient between the GAMA and WAIS-R VIQ, suggesting that the GAMA was more clearly associated with perceptual skills than verbal abilities. When the correlation coefficients between the GAMA and WAIS-R scores were corrected for the effects of range restriction, the correlation coefficients increased, yet demonstrated the same pattern (e.g., GAMA/PIQ,.69; GAMA/VIQ,.36; GAMA/FSIQ,.60). The GAMA s accuracy in predicting individual student performance on the WAIS-R FSIQ also was examined.
Lassiter
K S
KS
Department of Psychology, The Citadel, Charleston, SC 29409, USA.
Leverett
J P
JP
Safa
T A
TA
D000124:Achievement; D000293:Adolescent; D000328:Adult; D001076:Aptitude; D005260:Female; D006801:Humans; D007361:Intelligence Tests / Q000706:statistics & numerical data*; D007859:Learning Disabilities / Q000175:diagnosis* / Q000523:psychology; D008297:Male; D010364:Pattern Recognition, Visual; D010468:Perceptual Disorders / Q000175:diagnosis / Q000523:psychology; D011340:Problem Solving; D014888:Wechsler Scales / Q000706:statistics & numerical data*