I've a feeling I read about this before somewhere but nothing is showing up under a forum search for Sergeant. I thought it was interesting as sometimes many seem to think the only two options with psychological interventions is that they help or they don't make any difference.
Article continues at: http://www.bps-research-digest.blogspot.co.uk/2011/11/positive-psychology-exercises-can-be.htmlPositive psychology exercises can be harmful for some
Positive psychology exercises work by developing people's strengths and emotional resources, thereby building their resilience to depression. For a new study, Susan Sergeant and Myriam Mongrain wanted to test the idea that these exercises will be more effective if they're tailored to people's particular personality type. They focused on two traits associated with vulnerability to depression: being excessively self-critical and being excessively needy.