An Investigation of Reliability and Validity of the Third Version of

This research aimed to explore the reliability and validity of the TOSCA-3. To this aim, 404 students were randomly selected among Shahed University Students. All participants took the test. The reliability of this scale was determined by internal consistency (Cronbach Alfa) and the mean inter- item. Correlation of TOSCA-3 was determined for a randomly sellected sample composed of 70 students. Also, test- retest stability of TOSCA-3 (within a week period) was studied. In order to study the construct validity of TOSCA-3, Pearsonian product-moment correlation between the scores of TOSCA-3 and the GHQ-28 subscales was determined for a randomly selected sample compased of 56 students for the same university. Results showed appropriate construct validity and reliability for the three subscales of "Shame", "guilt" and "externalization", as well as appropriate relaiability for "in difference". "Alfa Pride", and "Beta Pride". Further studies using different methods and tools for determining validity and reliability of these subscales are suggested.