title: Advancement of the Subjective Vitality Scale: examination of alternative measurement models for Japanese and Singaporeans.
abstract: The Subjective Vitality Scale (SVS: Ryan & Frederick, 1997) is a 7-item self-report instrument to measure one's level of vitality and has been widely used in psychological studies. However, there have been discrepancies in which version of the SVS (7- or 6-item version) employed between as well as within researchers. Moreover, Item 5 seems not be a good indicator of vitality from a content validity perspective. Therefore, the present study aimed to evaluate the validity and reliability of the SVS for Japanese and Singaporeans rigorously by comparing 3 measurement models (5-, 6-, and 7-item models). To this end, the scale was first translated from English to Japanese and then the Japanese and English versions of the scale were administered to Japanese (n = 268) and Singaporean undergraduate students (n = 289), respectively. The factorial and concurrent validity of the three models were examined independently on each of the samples. Furthermore, the covariance stability of the vitality responses was assessed over a 4-week time period for another independent Japanese sample (n = 140). The findings from this study indicated that from methodological and content validity perspectives, the 5-item model is considered most preferable for both language versions of the SVS.
authors.affiliation: National Institution of Education, Nanyang Technological University, Singapore, Singapore.|School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia.
authors.forename: M
authors.initials: M
authors.lastname: Kawabata
authors.affiliation: Department of Health and Sports, Niigata University of Health and Welfare, Niigata, Japan.
authors.forename: F
authors.initials: F
authors.lastname: Yamazaki
authors.affiliation: National Institution of Education, Nanyang Technological University, Singapore, Singapore.
authors.forename: D W
authors.initials: DW
authors.lastname: Guo
authors.affiliation: School of Psychology and Speech Pathology, Curtin University of Technology, Perth, WA, Australia.
authors.forename: N L D
authors.initials: NLD
authors.lastname: Chatzisarantis
mesh_terms: D000328:Adult; D044466:Asian People; D005260:Female; D006304:Health Status; D006801:Humans; D007564:Japan; D007802:Language; D008297:Male; D008962:Models, Theoretical; D010549:Personal Satisfaction; D015203:Reproducibility of Results; D012846:Singapore; D011795:Surveys and Questionnaires; D014177:Translations; D055815:Young Adult
keywords: Measurement; confirmatory factor analysis; psychometrics