Effects of a Motivational Inducement on the Psychometric Properties of a Cognitive Ability Test

College students are often used in the development stages of cognitive ability tests that are designed to be used in business settings. One criticism of this strategy is that there are important motivational differences between these two settings that may limit generalization from one setting to the other. Research has not investigated the degree to which motivational inducements may enhance the psychometric properties of the tests with this population. In the present study, a 162-item cognitive ability test was administered to 320 undergraduate students, 160 of whom were given experimental credit for their participation (control group) and 160 of whom were given experimental credit but were also told that the top 25% of scorers each would receive $20 (experimental group). Results of differential item functioning and confirmatory analytic analyses suggested that the cognitive ability test was essentially equivalent across the two groups. Implications for cognitive ability test development and future research are discussed.