The aim of the present study was to investigate to what extent personality, gender and age can predict psychometric intelligence scores. A total of 900 participants completed the Watson-Glaser Critical Thinking Appraisal Test, the Graduate Managerial Assessment: Abstract, the Revised NEO Personality Inventory, and the Myers-Briggs Type Indicator Intelligence was found to be most consistently predicted by high Openness and low Neuroticism, which has been repeatedly reported in the past (Ackerman & Heggestad, 1997; Kyllonen, 1997), as well as by low Extraversion and low Conscientiousness, which has also been previously reported (Furnham, Chamorro-Premuzic, & Moutafi, under review). Of the demographic factors, there were no gender differences with respect to general intelligence (g), but age was found to be a significant negative predictor of g, in line with previous findings (Matthews, Davies, Westerman, & Stammers, 2000). Copyright (C) 2002 John Wiley Sons, Ltd.