A psychiatry research group develops a novel 12-item anhedonia scale in 200 patients with major depressive disorder (mean age 42, BP 128/82, HR 88) and 100 healthy controls (BP 120/76, HR 72). The scale correlates strongly with Hamilton Depression Rating Scale scores (r=0.87), weakly with serum sodium (r=0.12), and significantly distinguishes MDD patients from controls (p<0.001). Notably, anhedonia scores show no correlation with concurrent anxiety severity. These findings most strongly support which psychometric property of the scale?
- A)Construct validityGABARITO
- B)Spectrum bias
- C)Interrater reliability
- D)Criterion validity only
- E)Case fatality
Explicação
Construct validity refers to whether an instrument behaves as expected for the theoretical trait it is intended to measure. Strong correlation with related constructs, weak correlation with unrelated variables, and the ability to distinguish groups known to di... Ver explicação completa e trilha adaptativa →