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This study evaluated the psychometric properties of the 4 scales of the Behavioral Health Questionnaire-20 (BHQ-20): Global Mental Health, Well-Being, Symptoms, and Life Functioning. Four samples were used: community adults, college students, college students in counseling, and adults in outpatient psychotherapy. Support was found for internal consistency and 2-week test-retest reliability. For construct validity, the BHQ-20 scales distinguished levels of pathology among the samples and were sensitive to improvement across 3 psychotherapy sessions. Concurrent validity correlations with the scales of established measures were at least moderately high. Higher correlations were also found between the BHQ-20 scales and the nonanalogous scales of the established measures. These results, along with high correlations among the BHQ-20 scales, indicated the presence of 1 primary mental health dimension accounting for the variance. The BHQ-20 was proven to be a generally reliable, valid questionnaire that is distinguished by the efficiency with which it assesses mental health.
Kopta et al. (Sun,) studied this question.