Da. Clark et al., IS THE RELATIONSHIP BETWEEN ANXIOUS AND DEPRESSIVE COGNITIONS AND SYMPTOMS LINEAR OR CURVILINEAR, Cognitive therapy and research, 20(2), 1996, pp. 135-154
Two studies are reported that investigated the relationship between an
xious and depressive cognitions and symptoms in clinical and nonclinic
al adult samples. In the first study the Cognitions Checklist (CCL), B
eck Depression Inventory Beck Anxiety Inventory, and revised Hamilton
Rating Scales of Anxiety and Depression were administered to 1,553 psy
chiatric outpatients. Hierarchical polynomial regression analyses foun
d only a linear component underlying most of the relationships among c
ognition and symptom scales. In the second study, the CCL and measures
of anxious and depressive symptoms were administered to 50 depressed
psychiatric inpatients, 78 chronic medically ill patients, and 25 norm
al controls. The relationships of cognitions and symptoms differed acr
oss samples for both the clinical rating and self-report measures of s
ymptoms. However the results supported a linear relationship between f
requency of negative cognitions and severity of anxious or depressive
symptoms in the depressed inpatient, and to a lesser extent, medical s
amples.