The process and mechanisms of personality change

Although personality is relatively stable across the lifespan, there is also ample evidence that it is malleable. This potential for change is important because many individuals want to change aspects of their personality and because personality influences important life outcomes. In this Review, we examine the mechanisms responsible for intentional and naturally occurring changes in personality. We discuss four mechanisms — preconditions, triggers, reinforcers and integrators — that are theorized to produce effective change, as well as the forces that promote stability, thereby thwarting enduring changes. Although these mechanisms are common across theories of personality development, the empirical evidence is mixed and inconclusive. Personality change is most likely to occur gradually over long timescales but abrupt, transformative changes are possible when change is deliberately attempted or as a result of biologically mediated mechanisms. When change does occur, it is often modest in scale. Ultimately, it is difficult to cultivate a completely different personality, but small changes are possible. Personality is relatively stable over long timescales but remains malleable to some degree. In this Review, Jackson and Wright examine the mechanisms responsible for intentional and naturally occurring change as well as mechanisms that promote stability, thereby limiting potential change.