The number of breast cancer patients is increasing (TUIK, 2015). Therefore, there is an increase in the number of studies investigating the physiological and psychological effects of breast cancer. Psycho-oncology research indicated that depression and anxiety are the most common disorders in breast cancer patients (Cvetkovic ve Cvetkovic, 2017). Expressive Writing Intervention (EWI), which frequently affected these variables, also plays an important role in psycho-oncology literature (Pennebaker ve Susman, 1988; Sohl, Dietrich, Wallston ve Ridner, 2017). In the light of literature, the aim of this research is to test EWI for Turkish breast cancer patients in terms of the variables (depression, anxiety, and psychological flexibility) after the intervention. Ninety breast cancer patients who have completed their treatment processes will be considered as participants. Pre-test, post-test and follow-up (one month after post test) will be taken with the questionnaire set. Measures of depression, anxiety, quality of life, perceived social support and flexibility will be administered. Also, a booklet will be prepared for the implementation of the EWI. The measurements taken before - after the intervention and the follow-up measurement will be compared using ANOVA, t-test and regression. It is seen that physiological and psychological results affect the quality of life after cancer treatment. Researches showed that although depression, anxiety and psychological rigidity have a negative effect on cancer patients, some interventions, such as EWI, have changed this situation in a positive way. With this study, it is expected that expressing emotions in Turkish culture will have positive outcomes in breast cancer patients. After intervention expected results will be that participants' depression and anxiety symptoms will decrease and their quality of life and psychological flexibility will increase. This study is considered to be the first in terms of joining breast cancer and EWI in Turkish literature and it is thought that it will contribute significantly to the international literature with the results of EWI.

Expressive Writing Intervention for Turkish Breast Cancer Patients: A Study Protocol