In recent years, there has been a growing discussion about the necessity for mental health services not only to alleviate individuals' psychological distress but also to focus on enhancing the sense of meaning in life. Therefore, the MCCP aimed not only to reduce distressing psychological symptoms but also to facilitate the discovery of new positive meanings in breast cancer and individual's life, despite existing limitations. In this regard, the MCCP has been developed by drawing upon Meaning-Making Model, principles of meaning therapy, the literature on meaning, and existing meaning centered psychotherapy approaches. Additionally, considering limitations such as potential program changes, transportation difficulties, and inadequate physical conditions, online interventions offer a reliable alternative that provides numerous advantages for individuals diagnosed with breast cancer. Therefore, the intervention program was implemented online via video conference for women diagnosed with breast cancer in the current study. After the program was developed, a pilot study was conducted. According to the expert's feedback, the final version of MCCP was developed. The primary aim was to test the effectiveness of MCCP among women with breast cancer. The research hypotheses are 1) compared to control grup, MCCP group would show better improvement in meaning in life and PTG scores 2) compared to control grup, MCCP group would show better improvements in situational meaning (i.e. stress appraisal 3)Compared to control group, the MCCP group would report a significantly lower level of psychological distress.

Before the data collection process, ethical approval was obtained from the Institutional Ethics Committee of Dokuz Eylül University, affiliated with Dokuz Eylül University School of Medicine (Ethics Committee Decision No: 2021/12-39). The study has been announced using social media platforms (Facebook, Twitter, Instagram), oncology associations established to support oncology patients, and referrals from healthcare professionals to reach potential participants. The sample size was determined using the power analysis method. Then, 44 women diagnosed with breast cancer who volunteered to participate in the study were randomly assigned to either the intervention group or the waitlist control group.

The random assignment process was conducted using the website https://www.randomizer.org/. Participants in the MCCP group were assessed thrice: before the intervention, immediately after the intervention, and at the 2-month follow-up. The control group underwent the initial assessment before intervention began and the final assessment took place eight weeks later. After getting verbal and written consent from all participants, a number of measurement tools was applied. The Sociodemographic and Disease-Related Information Form, The Meaning in Life Questionnaire, Posttraumatic Growth Inventory-X, Stress Appraisal Measure, and Hospital Anxiety and Depression Scale were used. To test the hypotheses of the study, Pearson correlation analysis, 2 (Group) X 2 (Time) repeated measures ANOVA, and one-way repeated measures ANOVA were applied. SPSS 29.0 Package Program for Social Sciences was used for statistical analyses.