This article describes nine ways in which biological approaches can inform issues of central and long-standing concern to personality psychologists. These include: (a) developing an adequate description of human nature, (b) providing several solutions to the puzzle of within-species genetic variability, (c) identifying the most important ways in which individuals differ, (d) giving precision to...

Personality change is emerging as an important predictor of health and well-being. Extending previous research, we examined whether two types of personality change, directional and absolute, are associated with both subjective and objective indicators of health. Utilizing the longitudinal Midlife in the United States survey (MIDUS) data, we examined whether both types of change over 10 years we...

Predator-prey interactions play important roles in ecological communities. Personality, consistent inter-individual differences in behaviour, of predators, prey or both are known to influence inter-specific interactions. An individual may also behave differently under the same situation and the level of such variability may differ between individuals. Such intra-individual variability (IIV) or ...