Evaluating a Best Possible Self Intervention in a Prison Population

This preregistered experimental study investigates the effects of a brief positive psychological intervention (Best-Possible-Self, BPS) on affective, cognitive, and social dispositions in incarcerated individuals in an open prison setting. Participants are randomly assigned to a BPS intervention or a neutral writing control condition. Outcomes include positive and negative affect, optimism, pessimism, life satisfaction, aggression, and prosocialness assessed at four measurement occasions. The study aims to provide empirical evidence on the feasibility and effectiveness of short, resource-efficient interventions in correctional contexts.