IPT will be administered by the researcher who has completed the interpersonal relations psychotherapy training.

Patients in the control group will be asked to complete the post-tests at the same time after the experimental group interviews are completed. However, no intervention will be made to the control group.

IPT, was prepared by the researcher who completed the interpersonal relations psychotherapy training.The first interview will be conducted face-to-face in the offices of Koç University Faculty of Nursing. Subsequent sessions will be conducted via Zoom according to the availability of the patients included in the study. The day and time of the interviews will be planned according to the availability of the patients before the interviews. A total of 12 interviews are planned to be conducted with a patient for 40-60 minutes each. Interview intervals will be organized as once a week.

Each question has four answers. The lowest possible score is zero and the highest possible score is three. A total maximum score of 21 and a minimum score of zero can be achieved. Depression scores of breast cancer patients are expected to decrease after treatment. It is expected to fall below 4 points.

The highest score that can be obtained from the scale is 100 and the lowest score is 20. The high score obtained from each sub-dimension of the scale indicates that the individual has the characteristic evaluated by the relevant sub-dimension. Scores obtained from the scale were found to be related to the total score of the Difficulties in Emotion Regulation Scale and also to depression and anxiety.An increase in the interpersonal relations emotion regulation scale score is expected in breast cancer patients after treatment. This increase shows that it has a positive effect on individuals' emotion regulation.

The lowest score that can be obtained from the scale is "12" and the highest score is "84". An increase in the total score of the scale means an increase in the level of perceived social support. Social support scores of breast cancer patients are expected to increase after treatment.