Symptom-Positively and -Negatively Worded Items in Two Popular Self-Report Inventories of Anxiety and Depression
Substantially higher mean scores on symptom-negatively versus symptom-positively worded items have consistently been reported in the literature for the balanced State-Trait Anxiety Inventory. In this study we aimed to replicate and extend these findings to Dutch trait versions of the inventory and Zung's similarly balanced Self-rating Depression Scale. Analysis indicated significantly higher mean subscale scores for symptom-negative as opposed to symptom-positive items of both measures, across sexes and age groups as well as across different levels of distress in nonclinical (n = 863), subclinical (n = 450), and clinical subject samples (n = 96). Sex and age differences were mainly confined to symptom-positive subscales. Scale intercorrelations were lowest between symptom-positively and symptom-negatively worded scales both within and across measures. Factor analyzing the combined measures identified a symptom-negative and a symptom-positive factor, tentatively labeled “absence of positive affect” and “presence of negative affect.” Several explanations of the findings among which item-intensity specificity, the response style of social desirability, and the trait model of positive and negative affectivity are discussed.