The research was applied in a methodological type in order to develop a scale for the purpose of determining the nurses’ attitudes related to forensic psychiatry patients and to determine the availability and reliability of the scale developed.

The research was carried out with 650 nurses accepted to participate the research.Evaluation of the data was carried out over 536 questionnaires.In the research, Information Form, Belief Towards Mental Illness Scale(BMIS) and Nurse's Attitude Towards Forensic Psychiatric Patients Scale(NAFPPS) were used. NAFPPS was developed in two processes as qualitative and quantitative. In theoretical process, “focus group discussion” and “composition forms” and various attitude scales developed in psychiatry field in literature were used.In experimental process, validity and reliability analysis was built up.

Content validity index(CVI) was found .69, concurrent validity with BMI was found as .44, Cronbach Alpha coefficient determining the internal consistency was found as .86 and cluster correlation coefficient was found as .86, ön-test ile son-test arasındaki tutarlılığı belirleyen stability factor determining the consistency between pre-test and post-test was found as .69. It was determined that NAFPPS consisted of four lower dimensions.The highest point that can be acquired from the scale is “125”, the lowest point is “25”.High point shows the positive attitude towards the forensic psychiatry patient.

In the direction of these data, it was determined that Nurse's Attitude Towards Forensic Psychiatric Patients Scale was a valid and reliable scale.