Earlier in March, Winton Bates had a short piece How much does personality change over time? looking at some evidence suggesting that individual personalities may change more than is often realised.
This topic has always interested me. One of the difficulties lies in the distinction between personality and the way that personality manifests itself. Our personalities lead us to react in particular ways that can then feed back into apparent personality changes. But has our personality actually changed?
Just from observation, I think that the answer here has to be yes. This links to some of the discussion here from time to time on things like the impact of stress and the linked topic of resilience in both individuals and organisations.
A stressed organism may react to stress to the point that those behaviours become inbuilt even where the source of stress has been removed. For all practical purposes, personality has changed.