Abstract
This study was conducted to examine the psychometric properties of the GDS-15 among a sample of older adults in Beijing. A cross-sectional and correlational design was adopted. Through a stratified sampling procedure, 511 older adults were interviewed, using a standardized questionnaire. A second interview was then conducted on 48 older adults to evaluate the test-retest reliability of the GDS-15. Results of the analysis indicated that the reliability of the GDS-15 in terms of internal consistency (Cronbach α = .80) and test-retest reliability (r = .73) was satisfactory. Concurrent validity of the GDS-15 was demonstrated by its differential relationships with negative and positive affect. Significant relationships of the GDS-15 with life satisfaction, self-rated health, somatic symptoms, and social support also provided indirect evidence for the construct validity of the measurement.

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