Background:The present study has a practical purpose and a descriptive-analytical method using a questionnaire. The aim of this study was to investigate the relationship between cognitive distortions and cognitive fusion with psychological problems of children with intellectual disability.

Method: The statistical population of the study was the staff of intellectually disabled children and sample size was calculated 100 people using Cochran's formula and the questionnaires were randomly distributed among them. The validity of the questionnaire questions was confirmed by professors and experts in the field of psychology, and its reliability was calculated 0.83 using Cronbach's alpha test. SPSS software was used to analyze the data obtained from the questionnaire. Kolmogorov-Smirnov test showed that the data were abnormal. Eventually, the nonparametric Spearman test was used to test the research hypotheses.

Result:The results of Spearman test showed that the correlation between the two variables of cognitive distortion and psychological problems of intellectually disabled children was confirmed with a coefficient of 0.720 and sig = 0.003 and was accepted with a 95% confidence level. Due to the fact that the level of significance in the correlation coefficient is less than five percent, so there is a direct and significant relationship between the two variables of cognitive distortion and psychological problems of intellectually disabled children. As a result, H₀ hypothesis is rejected and H₁ hypothesis is confirmed.

Conclusion:The results showed that the correlation between the two variables of cognitive fusion with psychological problems of intellectually disabled children was confirmed with a coefficient of 0.170 and sig = 0.003 and accepted with a 95% confidence level. Due to the fact that the level of significance in the correlation coefficient is less than five percent, so there is a direct and significant relationship between the two variables of cognitive fusion and psychological problems of intellectually disabled children and as a result, the H₀ hypothesis is rejected and the H₁ hypothesis is confirmed.