The study was conducted in 2008. The statistical
population of the study comprised 587 students who were
studying in BSc level in public universities of Iran. Sample
size was determined by using Krejcie and Morgan table.
By using stratified proportional random sampling, 230
students were selected across the famous universities of
Tehran, Shiraz, Mollasani, and Razi Kermanshah. Data
were collected by filling out the questionnaires that had
been tested before and seconded, observations, and
secondary information resources