Abstract

UBEDA-COLOMER, J; PEREZ-SAMANIEGO, V  and  DEVIS-DEVIS, J. Psychometric properties of a Theory of Planned Behaviour questionnaire in physical activity in university students with disabilities. CPD [online]. 2018, vol.18, n.2, pp.3-17.  Epub Sep 25, 2023. ISSN 1989-5879.

The aim of this study was to assess the psychometric properties of a Theory of Planned Behaviour questionnaire in physical activity in university students with disabilities. The questionnaire was administered to 772 Spanish university students with disabilities. The factorial structure was validated by confirmatory factor analysis and Spearman correlations between the Theory of Planned Behaviour constructs and time devoted to physical activity were calculated to assess criterion validity. Reliability was assessed using Cronbach's alpha coefficient. Two models were assessed, one with four factors and other one with five factors. The model with five factors obtained better results (CFI=,97; RMSEA=,057; IC 90%:,049-,066) (α=0,870). Positive relations between all the constructs of Theory of Planned Behaviour and the time devoted to physical activity were also found. The results show that the instrument developed is valid and reliable and they suggest that “Self-efficacy” and “Controllability” should be considered as two independent factors of the model. In conclusion, the questionnaire could be a useful tool in order to gain knowledge about the psychosocial factors that affect physical activity participation of people with disabilities.

Keywords : Theory of Planned Behaviour; physical activity; people with disabilities; health promotion.

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