Abstract
This study aims to examine the effect of logotherapy and positive psychology-based group intervention developed by the researchers on intolerance of uncertainty and psychological well-being. A true experimental design with experimental and control groups was used in the study. The participants of the study consisted of volunteer university students with intolerance of uncertainty and anxiety problems. Participants were randomly assigned to the experimental and control groups. The experimental group received a 12-session logotherapy and positive psychology-based group intervention program aimed at coping with intolerance of uncertainty and increasing psychological well-being. The control group did not receive any intervention. In the study, pre-test and post-test measurements were taken using the Intolerance of Uncertainty (IUS-12) and the Flourishing Scales. Mann-Whitney U and Wilcoxon Signed Ranks tests were used for data analysis. As a result of the study, while there was no difference between the pre-test scores of the control group and the experimental group, it was observed that the intolerance of uncertainty scores of the experimental group were significantly lower than the control group as a result of the intervention. In addition, while there was no significant difference between the pretest and posttest intolerance of uncertainty scores of the control group, the posttest scores of the experimental group were significantly lower than the pretest scores. The results of the study showed that the psychological well-being scores of the participants in the experimental group increased significantly, while there was no significant difference in the control group. These results show that the group program was effective on intolerance of uncertainty and psychological well-being in university students.