Audio recordings consisting of pentatonic music and neva makam will be uploaded to the patients' phones by the researcher. Patients will be advised to listen to these music during the period they receive chemotherapy, and they will also be asked to listen to these music in at least 15-20 minute sessions per day and for at least 3 days during the week following chemotherapy.

Patients in this group will be asked to listen to the audio recording with pentatonic music and neva makam in the background, along with the affirmation sentences provided in the appendix. Patients will be advised to listen to these music during the period they receive chemotherapy, and they will also be asked to listen to these music in at least 15-20 minute sessions per day and for at least 3 days during the week following chemotherapy.

No application will be made to these patients, and standard care practices will be continued.

Audio recordings consisting of pentatonic music and neva makam will be uploaded to the patients' phones by the researcher. Patients will be advised to listen to these music during the period they receive chemotherapy, and they will also be asked to listen to these music in at least 15-20 minute sessions per day and for at least 3 days during the week following chemotherapy.

This scale is used to measure cancerous voice, youth, medium units, durable, anxiety, sleepiness, excitement, feeling good and shortness of breath. The measurement of the degree of feeling to be measured from the numbers 0 to 10 on a line on the scale. In the scale, 0 represents no hissing of the symptom, 10 represents very strong hissing. The Turkish validity and publication study of the scale was published by Kurt and Unsar and the Cronbach alpha value works as 0.70.

Beck Anxiety Inventory: Developed by Beck et al. (1988) to determine the level and frequency of anxiety symptoms experienced by an individual. The scale is a Likert-type self-assessment scale consisting of 21 items and scored between 0-3. The high total score indicates the high level of anxiety experienced by the individual. The score range varies between 0-63. The scale is evaluated as 0-7 points, no anxiety symptoms, 8-15 points, mild anxiety, 16-25 points, moderate anxiety, 26-63 points, severe anxiety symptoms. The validity and reliability study in our country was conducted by Ulusoy et al. (1998) and the Cronbach alpha value of the scale was found to be 0.93.

The scale was developed by Smith in 2008, and its Turkish validity and reliability study was conducted by Doğan in 2015. Brief Resilience Scale is a 5-point Likert-type self-report measurement tool consisting of 6 items. The answers are "Not at all appropriate (1), Not appropriate (2), Somewhat appropriate (3), Appropriate (4), Completely appropriate (5)". Items 2, 4, and 6 of the scale are reverse coded. The score obtained from the scale varies between 1 and 30. High scores obtained indicate high psychological resilience. In the validity and reliability study, the Cronbach alpha reliability value of the scale was found to be 0.83.