Psychometric properties of the International Personality Item Pool Big-Five personality questionnaire for the Greek population

Goldberg's International Personality Item Pool (IPIP) big-five personality factor markers currently lack validating evidence. The structure of the 50-item IPIP was examined in two different adult samples (total N= 811), in each case justifying a 5-factor solution, with only minor discrepancies. Age differences were comparable to previous findings using other inventories. One sample (N= 193) also completed additionally another personality measure (the TIPI Short Form). Conscientiousness, extraversion and emotional stability/neuroticism scales of the IPIP were highly correlated with those of the TIPI (r= 0.62 to 0.65, P= 0.01). Agreeableness and Intellect/Openness scales correlated less strongly (r= 0.54 and 0.58 respectively, P= 0.01). The IPIP scales have good internal consistency (a= 0.88) and relate strongly to major dimensions of personality assessed by the two questionnaires.