چکیده (انگلیسی):

The main purpose of the present research was investigating the effectiveness of group counseling in
students' adjustment based on Glasser's choice theory. This research was of quasi-experimental type and it was
conducted in pre-test and post-test design with the control group. The sample consisted of 24 students from Pandi
Martyr School in district 6 of Tehran that were randomly selected and among them 12 students were assigned to the
experimental group and the other 12 students went to the control group. Adjustment Inventory of high School Students
was used for data collection that was completed by the subjects in both pre-test and post-test. The inventory's reliability
was obtained 95% by the Alpha Cronbach’s. In addition, their face and content validities were confirmed by the
psychometric and topical experts. Experimental group (12 sessions, per week one session in 2 hours) was treated
Glasser's group reality therapy but control group received no treatments. The obtained data were analyzed by using
independent t. data analysis showed that using group counselling based on the Glasser's choice theory improved
general adjustment, social performance, and emotional performance (p<0.01) but in educational performance,
significant difference between the experimental group and the control group was not found. Results showed that using
Glasser's choice theory (reality therapy) is effective in increasing the adjustment.