Aaron Beck believed that depressed individuals feel as they do because their thinking is biased towards negative interpretations of the world, and they lack a perceived sense of control
The cognitive approach to explaining depression looks at our 'mental processes' (thoughts, attention, perceptions) and how they affect our behaviour
Cognitive Psychologists look at how irrational thinking (cognition) leads the patient to suffer from depression.
Beck (1967) explains depression as a vulnerability that can be caused by the person's cognition (the way they think) and their negative schemas.
Beck suggested there were 3 parts to cognitive vulnerability: