Depression

Strength of Beck’s theory

There is research support. Clark & Beck (1999) found that depressed people tend to have more negative thoughts and interpretations than non-depressed people. This supports the idea that negative thinking is associated with depression.

Cause or effect

It is difficult to establish cause and effect. Negative thinking may cause depression, but depression itself could cause people to think more negatively. Therefore, cognitive explanations may not fully explain the original cause of depression.

Strength of CBT

There is strong evidence for its effectiveness. Marchand et al. (2010) found CBT was effective in reducing depressive symptoms. This supports CBT as an effective treatment for depression.

Limitation of CBT

CBT may not work for everyone. Some people may have depression that is too severe to engage effectively with cognitive restructuring, meaning CBT may be less suitable for some individuals. This suggests treatment effectiveness can depend on the individual.