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Abstract
In this study the theory of planned behaviour was applied to predict use of dental floss among adolescents. The empirical data stem from a questionnaire survey of 15 year olds conducted in October 1992 in the county of Hordaland in Norway (N=970). Attitude, subjective norm perceived behavioural control and behavioural intention were measured at the baseline survey, and a measure of self-reported flossing was obtained in a subgroup of the original sample (n= 170) four weeks later. Multiple regression analysis showed that perceived behavioural control enhanced the prediction of intention to use dental floss over and above attitude and subjective norm. Actual use of dental floss was predictable from intention and perceived control. While past behaviour predicted intention beyond the components of TPB, this was not the case for actual use of dental floss. The predicted interaction between perceived behavioural control and intention upon behaviour was confirmed.
