Marriage is a major social tradition that meets people’s emotional, psychological, and social needs. However, marriage expectation failure can cause marital conflicts and divorce (
1). Statistics indicate an upward trend in divorce among Iranian families (
2), and the marriage-to-divorce ratio (4: 1) indicates one divorce out of four marriages (
3). According to studies, marital confusion has been the most relevant type of emotional dissatisfaction, classified as a subcategory of emotional disorders (
4). Thus, clinical examinations showed that the prevalence of emotional disorders (e.g., mood and anxiety) is five-to-six times higher in emotionally divorced couples (EDCs) than in normal couples (
5). The extent of these coincidences has made couples therapists more sensitive to pathological symptoms in developing treatment models and schemes (
6).
Emotion regulation is among the variables of relationship distress and emotional divorce in marital satisfaction, family functions, and harm from marriage defects, which attracted couple therapists in the last two decades (
7). Couples face many marital crises, which provoke their emotions (
8). Attempts by couples to manage their feelings and thoughts have a significant role in coping with severe reactions (
9). In other words, failure in emotion regulation can lead to sadness and even psychological harm, disrupting the continuity of an intimate relationship (
10,
11). Cognitive flexibility is another factor in preventing emotional divorce (
12).
Cognitive flexibility refers to the ability to learn from external and internal experiences, which varies in people and determines how they react to new experiences. Cognitive flexibility requires connecting with the present moment and separating from internal psychological experiences and thoughts (
13). Cognitive flexibility enables people to appropriately cope with pressures, challenges, and other problems in life (
14,
15). Some researchers have defined cognitive flexibility as changing cognitive cues and adapting to changing stimuli (
16). Cognitive flexibility entails an extensive range of human capabilities, from detecting and adapting to demands for changing behavioral approaches when these approaches endanger people’s personal and social functions (
17)—being cognitively flexible means staying aware of the environment and committing to behaviors in accordance with one’s values in all areas of life. Individuals with higher levels of cognitive flexibility are more responsible for personal and family interactions than less cognitively flexible ones. Therefore, cognitively flexible couples are more likely to accept personal differences and handle marital conflicts appropriately (
18,
19).
Evidence shows that couples in today’s society often seek treatment solutions to recreate relationship trust and satisfaction, especially in emotional bonds with their beloved people (
20). Therefore, developing effective and empirically supported approaches to couples therapy is essential. Integrative behavioral couple therapy (IBCT) can be considered a treatment solution, which helps couples reduce their conflicts by integrating acceptance and change and is known as context-based behavioral therapy (
21). Couples easily accept each other’s differences at the beginning of a relationship, and when they cannot accept such differences easily, they see each other as imperfect instead of different. Ultimately, couples start complaining about each other and try to change each other, leading to compulsive and negative behaviors such as lying, avoidance, and criticism (
22). Integrative behavioral couple therapy is based on four broad methods for improving the emotional acceptance of couples: Empathic joining regarding the problem, unbiased unity to assess the problem, increasing tolerance in coping with an annoying problem, and growing self-care skills against unsolvable problems. Integrative behavioral couple therapy uses axial change techniques like behavioral exchange, communication training, and problem-solving (
23). Previous studies have indicated that IBCT effectively improved family functions and marital intimacy (
24-
27).
The broad range of family and couple problems and a growing divorce rate have necessitated more effective treatments. In this regard, IBCT is among the integrative therapies, which attracted the attention of family and couple therapists in recent decades.