THE VALIDATION OF BASIC PSYCHOLOGICAL NEEDS IN EXERCISE SCALE A THAI VERSION (TBPNES)

Abstract

This study is aimed to validate the basic psychological needs in exercise scales in Thai version from Basic Psychological Needs in Exercise Scale (BPNES: Vlachopoulos and Michailidou, 2006). Participants were 11 to 18 years old students (N = 1,557) both males (n = 960) and females (n = 597), and were from Bangkok and metropolitan who normally exercised at least 3 days per week. The content validity of the questionnaire was done using a back translation technique by bilingual experts in both languages was employed and Cronbach’s alpha coefficient was calculated for reliability. Construct validity was also calculated using confirmatory factor analysis (CFA). The results revealed that the overall and internal consistency of the BPNES -Thai version was acceptable (α = 0.85). This 12-item questionnaire is under 3 subscales of Basic Psychological Needs in Exercise: Autonomy (α=0.70), Competence, (α=0.70), and Relatedness (α=0.76), item-total correlation was 0.30-0.66. The results revealed that the 3-factor structure of BPNES of Thai version fitted with the data very well (χ2 = 18.19, df =30, p = .96, GFI = 0.99, AGFI = 0.99, RMR = 0.00, RMSEA = 0.00) and were significant at level of 0.01. In conclusions, the basic psychological needs in exercise scales in Thai version showed satisfactory psychometric properties as to those of the original version and can be used for assessing Thai populations.
(Journal of Sports Science and Technology 2014;14(1): 213 -225 )
KEYWORDS: Questionnaire, Basic Psychological Needs in Exercise / Exercise /Thai population