Psychometric properties of the Mastery Scale-Chinese version: applying classical test theory and Rasch analysis.
OBJECTIVE
This study examines the reliability and validity of the Mastery Scale-Chinese version (MS-C) when applied to three groups diagnosed with major depression, schizophrenia, or HIV/AIDS.


METHODS
The individuals participating in the study were recruited from outpatient units of a medical center and a municipal hospital in northern Taiwan. The study sample (n = 2009) included 237 patients with depressive disorders, 160 with schizophrenia, and 1612 with HIV/AIDS. The reliability and construct validity of the MS-C was evaluated by confirmatory factor analysis (CFA) and Rasch analysis.


RESULTS
The results of the CFA showed that the MS-C has adequate construct validity with all indices meeting the criteria, except for chi-square values. The Rasch analysis supported the four-point rating scale structure and a unidimensional construct of the MS-C. The DIF analysis showed that all items demonstrated stable measurement properties among the different diagnosis groups (major depression, schizophrenia, HIV/AIDS).


CONCLUSIONS
This study found that MS-C has acceptable psychometric qualities in terms of reliability, construct validity, rating scale performance, and item characteristics when applied to patients with depression, schizophrenia, and HIV/AIDS in Taiwan.
School of Occupational Therapy, National Taiwan University , Taipei , Taiwan.
Yun-Ling
YL
Chen
Ping-Chuan
PC
Hsiung
Lyinn
L
Chung
Shing-Chia
SC
Chen
Ay-Woan
AW
Pan
D000163:Acquired Immunodeficiency Syndrome / Q000523:psychology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003865:Major Depressive Disorder / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D015203:Reproducibility of Results; D012565:Schizophrenic Psychology; D013624:Taiwan; D055815:Young Adult