Hartmann, P. The Five-Factor Model: Psychometric, biological and practical perspectives. Nordic Psychology, 58, 150-170.The Five-Factor Model (FFM) of personality is a trait approach to the conceptualization of personality. The five dimensions of FFM can be measured validly, although some potential confounders still need to be resolved. Furthermore, these psychometric findings have links to biology, like moderate heritability and physiological correlates, which suggests a biological basis for the FFM. Finally, knowledge of a specific subject's standing on the five dimensions can predict real life behaviour, thereby providing important information in relation to diagnosis, intervention and future outcomes. Although the FFM is only one among several approaches to personality it provides a platform for combining other approaches to personality, with the ultimate goal of providing a unified, research based framework for describing, explaining and doing research in personality.