Psychometric Evaluation of the Psychological Flexibility Scale for Adolescents

Thanpitcha  Sannarin; Chaiyun  Sakulsriprasert; Kulvadee  Thongpibul

Thanpitcha Sannarin M.S. student, Department of Psychology, Faculty of Humanities, Chiang Mai University
Chaiyun Sakulsriprasert Department of Psychology, Faculty of Humanities, Chiang Mai University.
Kulvadee Thongpibul Department of Psychology, Faculty of Humanities, Chiang Mai University.

Keywords: Psychological Flexibility for Adolescents (PFSA); Acceptance and Commitment Therapy (ACT); Psychometric properties

Abstract

Objective : To examine psychometric properties of Psychological Flexibility Scale for
Adolescents (PFSA).
Method : The samples were 312 high school students. For validity, confirmatory factor
analysis (CFA) was utilized for factorial validation. Concurrent validity was assessed as
correlation with Acceptance and action questionnaire (AAQ-II). Moreover, nomological
network with depression and mindfulness was investigated. For reliability, Cronbach’s
alpha coefficients and ω coefficients were estimated.
Result : The findings suggested that the 6-factor model of the PFSA demonstrated good
factor structures (χ2= 510.818, df = 309, p < .001, χ2/df = 1.653, CFI = .952, RMSEA =
.046). Moreover, it was found that psychological flexibility score was associated with
depression and mindfulness in accordance with theoretical expectation. In addition,
the PFSA demonstrated good internal reliabilities (Cronbach’s α ranged from .603 to
.790 and full-scale reliability at .897; ω reliability coefficients ranged from .634 to .847,
and full-scale reliability at .937)
Conclusion : The findings supported that the Psychological Flexibility Scale for
Adolescents is psychometrically sound questionnaire, which can be used for assessing
psychological flexibility in adolescents.

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