on Extraversion, see

Although an increasing number of studies have investigated relations between dimensions of personality and level of cognitive functioning, the research results have been somewhat inconsistent. Furthermore, relatively little is known about whether the personality-cognition relations vary as a function of age in adulthood. The current project examined these issues with data from a sample of 2,317 adults between 18 and 96 years of age who each completed a personality inventory and performed a broad battery of cognitive tests. The results revealed strong relations of the personality trait of Openness with several distinct cognitive abilities and smaller relations of other personality traits with specific cognitive abilities. Comparisons across different age groups indicated that the personality-cognition relations were both qualitatively and quantitatively similar across the adult years. One potential reason for the inconsistent results is that relatively little research has examined the possibility that personality-cognition relations might vary as a function of age (but see There were two major goals of the current project. The first was to determine which dimensions of personality are related to which aspects of cognitive functioning. The second goal was to investigate whether the personality-cognition relations differ across adulthood. Among the desirable conditions for providing meaningful answers to these questions are a moderately large sample of participants across a wide age range, reliable assessment of major dimensions of personality, broad and sensitive coverage of cognition, and evidence that the relevant aspects of both personality and cognition are measured in a similar fashion at different ages