engleski

Are you Smart Enough to Solve my Personality Test? Intelligence May Moderate the Psychometric Quality of the Personality Assessment

Both personality and intelligence may have an influence on the measurement of each other. For example, in a highly stressful assessment situation involving time pressure and/or selection, high neuroticism may increase the possibility of making errors in the ability testing. It is also possible that intelligence moderates the psychometric quality of the personality assessment. For example, more intelligent individuals may have a better understanding of item contents in some complex personality instrument, or they may have better insights into their past behavior. They may also have better ability to compare their own behavior with individual differences in the population, which is a standard task in personality measurement. Besides that, differentiation of personality by intelligence hypothesis, which has mixed support in a literature, predicts that personality is more differentiated, or variable, for individuals higher in intelligence. That would lead to the lower variance in less intelligent groups, and may potentially affect the psychometric properties of the personality measurement. The goal of this study was to compare the psychometric properties of personality assessments in the groups of participants who scored above and below the average in an intelligence measurement. We combined the three large datasets (N1 = 1050 ; N2 = 678 ; N3 = 830 ; Ntotal = 2558) in which the same vocabulary test was used as a measure of intelligence. As the verbal ability scores had a normal distribution, tertile splits were created. The psychometric properties of personality measurements were compared between the upper and lower tertile groups on the ability test. The results show clear support for the differentiation hypothesis in the two samples, as well as the moderation of personality measurement quality by intelligence. However, that trend was not clear in the third sample. Possible explanation and implications of the findings will be presented at the symposium.

personality assessment ; psychometric properties ; effects of intelligence

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