Evidence from Clark, beck and Cohen et al
One strength generally of Beck's cognitive model of depression is the existence of supporting research.
'Cognitive vulnerability' refers to ways of thinking that may predispose a person to becoming depressed, for example faulty information processing, negative self-schema and the cognitive triad. In a review David Clark and Aaron Beck (1999) concluded that not only were these cognitive vulnerabilities more common in depressed people but they preceded the depression. This was confirmed in a more recent prospective study by Joseph Cohen et al. (2019). They tracked the development of 473 adolescents, regularly measuring cognitive vulnerability. It was found that showing cognitive vulnerability predicted later depression.
This shows that there is an association between cognitive vulnerability and depression.