Abstract

GOMEZ-PERESMITRE, Gilda et al. Validation of an instrument of self-efficacy for the prevention of obesity in school children. Rev. Mex. de trastor. aliment [online]. 2017, vol.8, n.1, pp.21-30. ISSN 2007-1523.  https://doi.org/10.1016/j.rmta.2017.01.004.

The objective of this study was to adapt and evaluate, from a psychometric perspective, an instrument aimed at measuring self-efficacy and weight control in elementary school children. Through cognitive laboratories, the items of the original instrument are adapted for children of school age, and subsequently validated by a panel of judges. This version of the instrument was applied to 1151 participants, girls and boys of between 8 and 13 years old (M = 10.2, SD = 0.98), and examined through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The EFA derived a four-factor structure, with 25 items (α = 0.90), while the CFA derived a three factor model, with 20 items (α = 0.88), which showed a good fit (χ 2 /gl = 2.47, AGFI = 0.95, NFI = 0.93, CFI = 0.95, GFI = 0.96, RMSEA = 0.03, 90% [IC 0.034-0.042]). A parsimonious instrument with acceptable internal validity and consistency was obtained, which allows to measure three basic components of self-efficacy relative to the prevention of overweight, which are: physical activity, feeding and control over emotional feeding, not addressed in previous instruments.

Keywords : Self-efficacy; Prevention of obesity; Psychometric properties; Validity; Reliability.

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