Purpose：The purpose of this study was to examine the reliability and validity of the Norm-Consciousness Scale introduced by Nozu et al．This scale is composed of four subscales of “community”， “school”， “home” and “peer” (12items) ，and aims to examine the relationship between risk behaviors．
Methods：Data was collected from students in the tenth to twelfth grades of three high schools using an anonymous self-administerd questionnaire between October 2006 and February 2007；885 subjects were analyzed．The reliability was assessed using Cronbach's alpha coefficient to evaluate internal consistency and by the test-retest reliability．To examine the validity，we assessed the correlation between the Norm-Consciousness Scale by Nozu et al．and that by Wada et al．Moreover，the correlation between the Norm-Consciousness Scale by Nozu et al．and risk behaviors was examined．
Results：1) The Cronbach's alpha coefficients were “community”，．83； “school”，．90； “home”，．89；and “peer”，．78 for males，and “community”，．79； “school”，．87； “home”，．85；and “peer”，．72 for females．2) Regarding the test-retest reliability，significant correlations ( “community”，．55； “school”，．66； “home”，．61； “peer”，．65) were found after a week．3) Regarding the relationship between the Norm-Consciousness Scale by Nozu et al．and that by Wada et al．，the correlation coefficients were “community”，．48； “school”，．47； “home”，．54；and “peer”，．31 for males，and “community”，．40； “school”，．36； “home”，．46；and “peer”，．18 for females．4) For females，all the subscales of “community”， “school”， “home” and “peer” positively correlated with risk behaviors．For males，it was showed that “community”， “school” and “home” norm-consciousness positively correlated with risk behaviors．However，no significant correlation was shown between risk behaviors and “peer” norm-consciousness．
Conclusion：These results showed that the Norm-Consciousness Scale introduced by Nozu et al．has reliability and validity．It is also suggested that this scale is simple and useful for examining the relationship between risk behaviors．
