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Diabetes is a chronic, multifaceted and threatening disease which has significant psychologicalcomplications. The purpose of this study was comparing the efficacy of Acceptance and Commitment Therapy (ACT)and Dialectical Behavioral Therapy Skills Training (DBT-ST) on cognitive emotion regulation in patients with typeII diabetes.

The design of this quasi-experimental research was a pretest-posttest with a control group. The statisticalpopulation of the study included all patients with type II diabetes referred to Baghban (Touba) Medical Clinic inSari in 2019, among whom 45 patients were selected through the convenience sampling method and then randomlyassigned into three groups. The first group received ACT, the second group received DBT-ST, and the third group was considered as a control group. Data were collected using a 36-item Cognitive Emotion Regulation Questionnaire(Garnefsky et al., 2001) in three stages of pre-test, post-test, and follow-up, and were analyzed by repeated measurementvariance analysis.

The results showed that ACT and DBT-ST were significantly more effective on cognitive emotion regulationfor the experimental groups compared to the control group (effect sizes 0.911 & 0.967, respectively). The effectivenessof DBT-ST compared to ACT was more significant on cognitive emotion regulation scores (effect sizes 0.967) at(P>0.01).

Based on the results of this study, it can be concluded that ACT improved psychological indexes andmental health of patients with type II diabetes due to acceptance of unfavorable emotions and thoughts, commitment,and DBT-ST for emotion regulation and mindfulness components

Dialectical Behavior Therapy (DBT) is one of the cognitivebehavioral therapeutic methods based on skill training, which have drawn so much attention in recent years. This study aimed to determine the effectiveness of an intervention based on DBT in reducing trait and state anxiety level of patients with type II diabetes. The population study was all the patients with type II diabetes who attended private clinic in Sari among them 20 were permitted. An experimental pretest-posttest design control group was used. Participants of the experimental group received 12 therapeutic sections in 6 weeks. Each section lasted 2 hours where skills based on DBT were taught based on therapeutic manual (mindfulness, emotion regulation, tolerance and interpersonal efficacy). Spielberger State-Trait Anxiety Inventory (STAI-Y) was used to measure anxiety in pretest and posttest. Data were analyzed using analysis of covariance. Results showed that modifying the preset effect, there was a a statistically significant difference between two groups in the posttest Consequently, the intervention based on DBT is effective in the reduction of statetrait anxiety in patients with type II diabetes.