Stability in the structure of health locus of control among adolescents

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Abstract
The Multidimensional Health Locus of Control (MHLC) scales have been widely used as a measure of health beliefs in adult populations. In a longitudinal study of an adolescent cohort, we examined some of the properties of the MHLC; whether there are changes in the locus of beliefs between the ages of 13 and 15 years; and the extent of gender differences at the two ages. The results provided some degree of support for the previously proposed structure of the MHLC, but showed correlations among the subscales that were higher than might be expected, and lower alpha reliability coefficients than have been reported for adult samples. There was also evidence of downward changes in scores for the 'chance' and 'powerful others' scales, as well as differences in the factor structures of females and males at age 15 years. In contrast to the structure of health beliefs found with some adult samples, 'chance' is a prominent, independent dimension of beliefs about control of health among adolescents. The independence of the 'internal control' and 'powerful others' scales seem to be a function of both age and gender. As health behaviours are multidetermined, it is concluded that the MHLC measure would be useful as part of an index of health status.

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