What is the cognitive approach to explaining depression?

Cognitive approaches look at the meditional processes that govern behaviour. One cognitive explanation of depression was proposed by Aaron Beck. This is the 'negative traid', which invovles having negative thoughts about the self, world and future. For example, if you have depression, you may believe 'I am worthless', 'everybody hates me because I am worthless', 'nobody will ever like me because I am worthless'. This triad is kept going by cognitive biases and negative self schemas. Cognitive biases tend to be negative ways of thinking. An example might be selective abstraction, whereby someone with depression may take a small part of a situation that they interpreted negatively, and make generalisations about that. For example if you walked into a room, and nobody looked at you for the first minute, if you had depression you may believe that everybody in that room hates you, when they may have just not have heard you enter. A schema is defined as a mental framework of expectations derived from expereince. Therefore, a self schema is to do with how you interpret yourself, which if it is negative it means that you interpret yourself in a negative light. An example of a negative self schema is negative self evaluation schema, whereby you evaluate yourself negatively. Overall, the model suggests that these faultly thought processes lead to the development of depressive symptoms.