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Psychometric properties of the State–Trait Anxiety Inventory among Japanese clinical outpatients
Author(s) -
Iwata Noboru,
Mishima Norio,
Okabe Kenjiro,
Kobayashi Nobuyuki,
Hashiguchi Etsuko,
Egashira Kazumichi
Publication year - 2000
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/(sici)1097-4679(200006)56:6<793::aid-jclp8>3.0.co;2-4
Subject(s) - anxiety , psychology , clinical psychology , trait , cronbach's alpha , population , trait anxiety , psychometrics , psychiatry , medicine , environmental health , computer science , programming language
The factor structure and internal consistency of the Japanese adaptation of the State–Trait Anxiety Inventory Form Y (STAI‐JY) were examined for 218 Japanese clinical outpatients (86 males, 132 females) with psychiatric and/or psychosomatic complaints. An initial principal‐component analysis revealed that the first three components were considered to reflect the “overall anxiety” component, the “presence–absence of anxiety (positive–negative)” component, and the “state–trait anxiety” component. The component related to presence or absence of anxiety was larger than the state–trait anxiety component. Factors followed by an oblique (promax) rotation were labeled “Anxiety‐absent” and “Anxiety‐present” factors for a two‐factor structure, and “Anxiety‐present,” “Anxiety‐absent/state,” and “Anxiety‐absent/trait” factors for a three‐factor structure that was suggested by the scree test. The internal consistencies for both the state and trait anxiety subscales of the STAI‐JY were at a satisfactory level, whereas slightly higher Cronbach's αs were obtained from separate calculation for anxiety‐present and anxiety‐absent items. Similarities and differences in the factor structure of the STAI‐JY were discussed in comparison with those reported earlier for the general population in Japan and for individuals in Western countries. © 2000 John Wiley & Sons, Inc. J Clin Psychol 56: 793–806, 2000.