Does Personality Provide Unique Explanations for Behaviour? Personality as Cross-Person Variability in General Principles

I propose that personality does not provide unique explanations for human behaviour. Two principles, accessibility as a `cognitive' principle and regulatory focus as a `motivational' principle, are used to illustrate how personality can be reconceptualized as a cross-person source of variability in the functioning of general psychological principles that have situational sources of variability as well. For each of these principles, evidence is presented that `persons' and `situations' as sources of variability have similar e€ects. I then provide some other examples of psychological principles having similar e€ects when either persons or situations are the source of variability. I discuss the utility of a `general principles' perspective for understanding the many ways that persons, groups, and situations can contribute to manifesting the same pattern of principles, and how some patterns are more adaptive than others. The implications of there being multiple ways of manifesting the same pattern are then considered for the classic issues of when personality is revealed and what is its range of applicability. Copyright # 2000 John Wiley & Sons, Ltd.