Mahin Dokht Reisi Dastgerdi - Department of Psychology, Psychology and Educational Faculty, Islamic Azad University, Isfahan Branch (Khorasgan), Isfahan, Iran.
Mozhgan Arefi - Department of Psychology, Psychology and Educational Faculty, Islamic Azad University, Isfahan Branch (Khorasgan), Isfahan, Iran.

Background: The emergence of generalized anxiety disorder in the students causes creation of other psychological and cognitive damages. Therefore the present study was conducted to determine the effectiveness of cognitive therapy according to Dougas model on Meta-Cognitive Beliefs and Emotion Regulation in the students with generalized anxiety disorder. Methods: The research method was quasi-experimental with pretest, posttest and control group design the statistical population included students with generalized anxiety disorder in academic year 2017-18 in the city of Isfahan. 30 students with generalized anxiety disorder were selected from the statistical population purposive non-random sampling method and were randomly replaced into experimental and control groups (15 students in the experimental and 15 in the control group). The experimental group received twelve ninety-minute sessions of therapy interventions related to cognitive therapy based on Dougas model during three months once a week while the control group didn’t receive any intervention during the study. The applied instruments included generalized anxiety disorder questionnaire, emotion-regulation questionnaire and meta-cognitive beliefs questionnaire. Data analysis from the study was done via SPSS23 software through Descriptive statistics (mean and standard deviation) and inferential statistics (analysis of covariance) method. Results: The results of data analysis showed that cognitive therapy based on Dougas model has significantly influenced Meta-Cognitive Beliefs and Emotion Regulation in the students with generalized anxiety disorder (p < 0.001) in that this therapy could lead to the increase of Meta-Cognitive Beliefs and Emotion Regulation in the students with generalized anxiety disorder. The effect size of this treatment on metacognitive beliefs and emotional adjustment was 0.72 and 0.80, respectively. Conclusion: According to the findings of the present study it is suggested to apply cognitive therapy based on Dougas model as an efficient method in order to increase Meta-Cognitive Beliefs and Emotion Regulation in the students with generalized anxiety disorder.

Generalized Anxiety Disorder, Cognitive Therapy, Meta-Cognitive Beliefs, Emotion Regulation