摘要：AbstractThe aim of this study is to survey of validity and reliability of substance abuse subtle screening inventory (SASSI - 3). 680 students from universities of Tehran and 102 addicted patients of clients of substance abuse treatment centers in Tehran were included. Chronbach's alpha for SASSI-3 obtained 0.74. This relatively high level of Chronbach's alpha showed relatively high level of reliability. Correlation results, between SASSI–3 scales and also SASSI–3 show convergence of SASSI-3 at measurement of single phenomenon. The positive correlation of SASSI-3 and AAS show opportune convergent validity. the difference of t-test scores of students and addicted patients on SASSI-3 and the difference of main effect of group variable on SASSI-3 scales between students and addicted patients according to (MANOVA) show opportune discriminant validity and Az(discriminant index) of 0.97 for SASSI - 3 show opportune diagnostic validity.
