POSTER: Validating Speed-Accuracy and Differential Aptitude Sub-scores of a short General Mental Ability Measure (original) (raw)

2016

Abstract

Introduction General Mental Ability (GMA) is according to meta-analytical research the single best predictor of work performance. The question arises how speed and accuracy in answering questions across various ability areas underpin test performance and validity. Objective The present study investigates the psychometric of sub-scores of a short measure of GMA. Method/Design Psychometric studies were undertaken involving Logiks General which measures GMA through 24 Verbal, 16 Numerical and 10 Abstract problems in three separately timed sections of 4 minutes. Results Internal Consistency reliability on N=177 was satisfactory for the Total score (.76) and slightly below the .70 level required for stand-alone interpretation for Verbal (.64), Numerical (.62) and Abstract (.57) sub-tests. Same day completions (N=138) resulted in an adequate correlation of .766 for Total, .801 for Speed and .757 for Verbal sub-scores. Accuracy (.681), Numerical (.660) and Abstract (.599) fell slightly sho...

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