Abstract
The present study investigated age and gender differences in Big Five in a Malay speaking Malaysian youth (N=1036). Participants ranging in age from 15 to 39 years completed Big Five Inventory (BFI). Age differences were found suggesting that mean levels of Neuroticism are negatively associated with age, whereas Agreeableness, Conscientiousness and Extraversion are positively associated. Openness to experience demonstrated a curvilinear associated with age with highest mean levels in middle age of the youth and for female is great drops in the mean levels as they reach pre adulthood stage. Gender differences were found suggesting that male in average have higher level of Agreeableness, Conscientiousness and Extraversion, while female found were to Neuroticism. Openness to experience factor, men are more positive throughout their life.