Support for cognitive distortions in depression: Grazioli and Terry (2002) assessed 65 pregnant women for cognitivevulnerability and depression before and six weeks after birth. They found that the women judged to have been high in cognitivevulnerability were most likely to develop postpartumdepression.
Cognitive explanations for depression have been used to develop successful and widely used CBT and REBT treatments. The success of these treatments is shown by March et al (2007). Suggests that the underlying cognitive theory that depression is due to faulty cognitions is valid as the treatment based on that idea is effective.