The purpose of this research is to examine the result of the process-based thinking model conducted in a workshop on the Comprehensive Reflective Thinking (CRT) of university students. The method of research was experimental with the use of control and experimental groups. The research included pretests and posttests. The statistical population was comprised of students from the University of Sistan and Baluchestan (USB). The subjects were selected randomly from voluntary students who were matched in the two experimental and control groups. The students of experimental group participated in a ten-session workshop. The instrument used for gathering the data was a Comprehensive Reflective Thinking Scales (CRTS). Statistical analysis was conducted by the analysis of covariance method. Results show that the CRTS scores for the experimental group were significantly higher than the CRTS Score for the control group. There were no significant differences between the CRTS scores of boys and girls. But the interaction of gender within the groups shows that the CTRS scores for males in the experimental group are significantly higher than for males in the control group.