2017, Number 1
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Revista Mexicana de Trastornos Alimentarios 2017; 8 (1)
Validation of an instrument of self-efficacy for the prevention of obesity in school children
Gómez-Peresmitré G, Platas AS, Pineda-García G, Guzmán SR, León HR
Language: Spanish
References: 35
Page: 21-30
PDF size: 637.41 Kb.
ABSTRACT
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
(
χ2/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.
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