Response biases and the relation between negative life events and psychological symptoms.

This research was an investigation of whether reporting biases can account for the correlation between negative life events (as measured via life events questionnaires) and subclinical psychological symptoms. Subjects completed two life events scales, a measure of psychological symptoms, a measure of depression, and a measure of social desirability. Friends were asked to report about life events experienced by the subjects. No evidence was found for a subject reporting bias associated with social desirability, depression, or symptoms. In fact, for one of the life events scales, depression was significantly associated with a higher rate of agreement between subjects and friends as to which negative events occurred to subjects. Moreover, there were significant correlations between symptom and depression measures and life events measures that were free of subject-reporting biases (subjects' negative life events reported by both subjects and their significant others, as well as subjects' negative life events as reported by significant others alone). These data suggest that response biases may not be able to account for the relation between negative events and psychological symptoms. Thus the hypothesis that negative life events play a significant role in symptom development remains plausible.