Explanatory style refers to the way an individual habitually makes sense of life events. Fortunately, these attributional habits can be changed. People can be taught to interpret events in more positive ways through a process known as learned optimism. Interventions often focus on skills like recognizing and avoiding thinking traps, questioning negative beliefs, and relaxation. Training in healthier attribution habits has been proven to make people less vulnerable to depression. Examples of such interventions include the Penn Resiliency Program and the Comprehensive Soldier Fitness Program.