After the pretest, the experimental group was intervened with a motivational interview (MI) method that consisted of four sessions of 30-60 (mean 45 min) min each. The sessions were structured according to the Behavior Change Stage Identification Form developed by the researcher by making use of the trans-theoretical model and adapting it to diabetic patients. The subject of the first session was "Opening, Structuring the Discussion, and Establishing the Agenda"; the subject of the second session was "Improving Motivation for Change"; the subject of the third session was "Summarizing, Support, and Talking about the Change"; and the subject of the fourth session was "Evaluation" . The discussions were completed in four weeks, with one discussion held every week. The final test and the Diabetes Self-Management Instrument were applied again to the members of the intervention group in the third month after completion of the MI method sessions.

The control group received routine treatment. The final test and the Diabetes Self-Management Instrument were applied again to the members of the control group in the third month.

After the pretest, the experimental group was intervened with a motivational interview (MI) method that consisted of four sessions.The pretest and posttest Diabetes Self-Management Scale total scores and HbA1c values of the patients in the experimental and control groups were compared.

The instrument is comprised of 35 questions covering the period from the previous three months to determine the frequency of the implementation of the self-management skills of the patients. The total score for the Instrument ranged from 35 to 140. A higher score showed that self-management activities were implemented on a more regular basis. Interventions consisted of four sessions of 30-60 (mean 45 min) min each. The sessions were structured according to the Behavior Change Stage Identification Form developed by the researcher by making use of the trans-theoretical model and adapting it to diabetic patients.The discussions were completed in four weeks, with one discussion held every week. The final test and the Diabetes Self-Management Instrument were applied again to the members of the intervention group in the third month after completion of the MI method sessions and in the third month to the control group.

The pretest and posttest HbA1c values of the patients in the experimental and control groups were compared in the third month.