Journal of Occupational

Introduction
Divorce represents a crisis affecting individuals’ psychosocial and emotional health. It is associated with a lot of psychological pressures imposed on the involved spouses. Problems resulting from divorce vary depending on individuals’ social, family, cultural, and even gender backgrounds [1, 2]. Divorced women who experience an emotional crisis have also lower social adjustment. Divorce has many negative psychological and social effects on women including the increased risk of mental and physical diseases, violence, and problems in expressing emotions. Moreover, divorce disturbs women’s psychosocial adaptation [3]. The psychological pressures following divorce influence the level of adjustment to such pressures [4]. In contrast, an increase in the individual and social adjustment of divorced women would positively affect their acceptance of daily roles and responsibilities including employment, family, and others, as well as the development of their self-dependence [5]. Individuals sometimes suffer from emotional disorders due to some challenges faced in their life, which consequently threatens their emotional health and self-esteem [6, 7]. To this end, cognitive emotion regulation is mainly to support and shape a person's self-esteem, efficiency, and individuality by arousing positive emotions and avoiding negative emotions [8]. Divorced women will face many challenges in life if they have no proper cognitive emotion regulation as a result of their problems [9].
One of the main skills to be acquired is the ability to control one's emotions. If a person’s cognitive emotion regulation does not function properly, the person will not be in a calm and stable state of emotional arousal and as such he/she cannot monitor and change his/her emotional experiences [10]. Cognitive emotion regulation plays a critical role in women's adjustment to stressful life events. The findings of previous studies have revealed that individuals’ ability to effectively regulate their emotions is associated with significant impacts on their psychological well-being, interpersonal relationships, and mental health [11].
To solve and alleviate the aforementioned problems among this group of women, appropriate strategies should be adopted to improve their psychosocial adjustment and cognitive emotion regulation [12]. In recent years, the dialectical behavior therapy (DBT) approach has been used as one of the most common techniques for reducing the symptoms of mood, emotional, and anxiety disorders [13]. According to Martin et al. [14], DBT is directly involved in improving individuals’ emotion regulation. There have also been some reports on the effectiveness of DBT and its group training in reducing self-harm behaviors, regulating emotions, and improving some mood and emotional disorders such as depression, anxiety, anger, emotional instability, and irritability. This technique highlights the role of emotion regulation and the goals of acquiring skills to encourage the cognitive control of maladaptive behavior patterns [15, 16]. In terms of training, DBT supports the improvement of strong emotional control skills, the reduction of self-centered behaviors, and the promotion of interpersonal relationships to strengthen individuals’ adaptability [17]. This intervention, as a holistic treatment technique, helps a person identify one’s inner contradictions or the conflicts between himself/herself and the environment and achieve effective outcomes by combining and merging them [18]. DBT encompasses four main categories of mindfulness, emotion regulation, the effectiveness of interpersonal relationships, and ambiguity tolerance. This technique encourages individuals to adopt mindfulness in their daily activities. Training mindfulness skills in this intervention will help individuals to change their maladaptive behaviors, emotions, and thoughts as well as their interpersonal relationships in their life [13].
Divorced women deal with a large number of psychological, social, and emotional problems, all of which disturb the quality of their life. Proper training is required for this group to increase their psychosocial adjustment to life challenges and society and to help them to properly regulate their emotions. Accordingly, DBT can significantly contribute to improving psychosocial and emotional well-being of divorced women who perceive many psychosocial and emotional problems and suffer from lots of psychological pressures. Accordingly, the present study aimed to investigate the effect of DBT on divorced women's psychosocial adjustment and cognitive emotion regulation.
 
Materials and Methods
A quasi-experimental method with a pretest-posttest design and a control group was employed to conduct this study. The research population included the divorced women who were affected by divorce-related psychological problems and referred to Tehran consultation centers in 2018. Via convenience sampling, we selected 30 women who were willing to participate in the project. Fifteen participants were included in each group using G*Power statistical software and with an effect size of 1.7, a test power of 0.95, and α=0.05 [19]. The inclusion criteria were getting a score lower than mean on the Psychosocial Adjustment to Illness Scale and the Cognitive Emotion Regulation Questionnaire, having psycho-personality disorders based on the questionnaire information, having at least a middle school literacy level, having married for at least a year, and divorced. The exclusion criteria were being absent at more than two treatment sessions, reluctance to continue the treatment process, having physical disorders, and taking medications. Dialectical behavior therapy training was performed by a family therapy therapist who had received specialized training and skills in this field. The therapeutic sessions were held one session per week. Two weeks after the completion of the training sessions, the post-test was administered to the participants in the intervention and control groups. The members of the control group did not receive any intervention. To comply with the requirement for ethical considerations, the researchers obtained written consent from all members of the two groups for their voluntary participation in the study.
The Psychosocial Adjustment to Illness Scale: This scale was developed by Derogatis [20] and contains 46 items and seven subscales (health care orientation (7 items), vocational environment (6 items), family environment (8 items), sexual relationships (6 items), extended family relationship (5 items), social environment (6 items), and psychosocial distress (7 items)). The items in the scale are scored based on a four-point Likert scale (0–3). The scores of all subscales were summed to determine the total score, which ranged from 0 to 138. A higher score on this scale indicates a lower psychosocial adjustment to illness. The construct validity of this scale using exploratory factor analysis indicated that the seven subscales together explain 63% of the total variance of the scale. Feghhi et al. [21] reported the reliability of the scale to be 0.91. In the present study, the reliability coefficient of the scale was 0.85 based on Cronbach's alpha coefficient.
The Cognitive Emotion Regulation Questionnaire (CERQ): This questionnaire was developed by Garnefski and Kraaij [22]. It is a multi-dimensional questionnaire measuring cognitive coping strategies in the face of unfavorable incidents or situations. This questionnaire is a self-report tool with 36 items and assesses two emotional regulation subscales positive emotion regulation (acceptance,
refocusing on planning, positive refocusing, positive reappraisal, and putting into perspective) and negative emotion regulation (self-blame, blaming others, rumination, and catastrophizing). Responses to the items in the questionnaire are scored on a five-point Likert scale ranging from 1 (almost) never) to 5 (almost) always). The positive emotion regulation subscale contains 20 items and the negative emotional regulation subscale contains 16 items. The total score is calculated as the sum of the scores obtained on the two subscales. Therefore, subscale scores can range from 4 to 20, with higher scores indicating a greater frequency of using a specific cognitive strategy. The range of scores for positive emotion regulation was between 16 and 80 and negative emotional regulation scores were between 20 and 100. Garnefski and Kraaij [22] reported the internal consistency of this questionnaire equal to 0.71 based on Cronbach’s alpha coefficient. Besharat [23] assessed the construct validity by calculating the correlation coefficients between the scores of some participants in two shifts with an interval of two to four weeks. The corresponding values for the two subscales ranged from 0.42 to 0.57 at the level of 0.001. The test-retest reliability of the subscales was reported as 0.75-0.81. Besodes, the reliability and validity of the questionnaire were reported to be at an acceptable level [23]. In this study, Cronbach’s alpha was 0.79 for the questionnaire.
The participants in the intervention group received the dialectical behavioral therapy (DBT) intervention in ten 90-min sessions (one session per week). The content of the sessions is summarized in Table 1:

Table 1. Dialectical behavior therapy (DBT) sessions [24]

The Kolmogorov- Smirnov test was used to examine the normality of distribution of the pre-test and post-test data. Besides, Levene's test was run to investigate the equality of variances. The collected data were analyzed using descriptive and inferential statistics, such as mean, standard deviation, multivariate analysis of covariance (MANCOVA), and analysis of covariance (ANCOVA) with SPSS software (version 24.0). Cronbach's alpha values were calculated to specify the reliability of the questionnaires.
 
Results
The mean and standard deviation (SD) of psychosocial adjustment post-test scores for the participants in the intervention and control groups
were 64.33±4.32 and 53.20±4.72 respectively. The mean and SD of positive emotion regulation post-test scores in the intervention and control groups were reported as 28.00±7.26 and 57.13±3.51, respectivly. Meanwhile, the mean and SD of negative emotion regulation post-test scores in the intervention and control groups were respectively reported as 63.57±12.54 and 43.10±13.25. According to the results, the post-test scores of positive emotion regulation and negative emotion regulation were respectively increased and decreased in the intervention groups. Table 2 presents the mean and standard deviation (SD) of the pre-test and post-test scores of hypochondriasis and emotion regulation for the intervention and control groups.

The null hypothesis indicating the scores for psychosocial adjustment, positive emotional regulation, and negative emotional regulation in the intervention and control groups had normal distributions. In other words, that the normality assumption of the distribution of post-test scores in both intervention and control groups was accepted (Table 3):

The interaction F-values of all the variables were not significant (P> 0.05); hence, the assumption of homogeneity of variance was accepted. Furthermore, the Levene's test results were not significant for psychosocial adjustment and positive/negative emotional regulation (P> 0.05); hence, the variances of the variables were not significant between the two intervention and control groups. Accordingly, the assumption of homogeneity of variance was confirmed. Moreover, the null hypothesis indicating the equivalence of the score variances was accepted. That is, the assumption of homogeneity of score variance in the two intervention and control groups was confirmed.
The results of the multivariate analysis of covariance (MANCOVA) showed a significant difference between the divorced women in the intervention and the control groups in terms of at least one of the dependent variables (namely psychosocial adjustment and positive/negative cognitive emotion regulation). As shown in Table 4, there was a significant difference between the divorced women in the two groups in terms of psychosocial adjustment, positive cognitive emotion regulation, and negative cognitive emotion regulation. That is, the analysis of the mean scores of the research variables indicated that this type of therapy promoted psychosocial adjustment and positive emotional regulation and decreased negative emotional regulation in the intervention group compared to the control group. The effect sizes were 0.77 for psychosocial adjustment, 0.82 for positive cognitive emotion regulation, and 0.80 for negative cognitive emotion regulation. In other words, 77%, 82%, and 80% of the individual differences in the post-test scores for psychosocial adjustment, positive and negative emotion regulation of divorced women belonged to the impact of dialectical behavior therapy.