A psychometric investigation into the use of an adaptation of the Ghiselli Predictability Index in personnel selection
Original publication is available at http://www.sajip.co.za
The magnitudes of validity coefficients typically encountered in validation studies are disappointingly low. Validity coefficients typically fall below 0,50 and only very seldom reach values as high as 0,70. Numerous possibilities have been considered on how to affect an increase in the magnitude of the validity coefficient. A thought-provoking alternative to the usual multiple-regression based attempts may be found in the work of Ghiselli (1956, 1960a, 1960b). The objective of this article is to propose and evaluate a modification to the original Ghiselli procedure. Encouragingly positive results were obtained. Recommendations for future research are made.