The diathesis-stress model integrates biological and psychosocial factors to determine the likelihood of a disorder.
Psychological disorders in the past were viewed as supernatural and those who had disorders were thought to have been affected by black magic or spiritual possessions.
Taylor and colleagues (2006) found that individuals with two long alleles of the 5-HTTLPR serotonin transporter gene were at a lower risk of developing depression when faced with early childhood adversity and adversity later on in life.
Participants, however, who had two short alleles of the 5-HTTLPR gene, although at greater risk of developing depression if they experienced stress early on and later on in life, reported fewer depressive symptoms if they had not experienced any adversity during their childhood and adult life.
Which theory does this provide evidence for?