This qualitative study was done using the conventional content analysis approach, and because of its qualitative design, it was guided by a constructivism philosophy (paradigm).
The participants who were able to express their perceptions about the prevention of violent behavior of adolescents and were willing to participate and provide their perceptions in the study, including students and other people mentioned in the interviews, parents of students, school administrators, school teachers, educational counselors, health instructors, and students’ grandmothers were included. In such studies, targeted purposive sampling is used, which is not a kind of probabilistic sampling (
17). Thus, participants were chosen based on purposive sampling, and data were obtained using semi-structured interview forms. In-depth individual interviews were performed in an isolated room in the schools for the participants’ comfort and privacy.
Inclusion criteria were the ability to understand questions and express one’s own opinions and desire to participate in the study, whereas exclusion criterion included unwillingness to participate in the study. The interviews lasted between 20 and 115 min with an average of 89 min. Except for one case, just one interview was held with the rest of the participants.
In the present study, the data were analyzed using content analysis by a method described by Graneheim and Lundman (2004), which is a systematic and transparent eight-step method for processing and analyzing data (
18).
The researcher achieved saturation after 46 interviews, and to make sure, 4 additional interviews were carried out. For a semi-structured interview, a general guide or survey list was prepared. At this stage, after each interview, the data were implemented, classified, and sorted and the interview questions were edited and revised as needed for further interviews. Then, data analysis was done with coding, continuous comparison, and noting. This step continued recursively until data saturation, otherwise, the researcher returned to the participant selection stage, and this process was repeated again. Because the qualitative research is conducted in a real-world environment, a deep interview was conducted with students who had the inclusion criteria in a quiet place with sufficient psychological security. The participants were assured that answering the questions is completely arbitrary, and they can refuse to answer the question or even discontinue the interview. The interview place was agreed by the interviewees to be the counseling room of Roodsar girl schools in 48 cases, and it was the interviewer’s house for two others.
Zhang (2009) quoted Lincoln's criteria of credibility, dependability, confirmability, and transferability for accuracy in content analysis (
19). In this research, to achieve dependability, the researcher gave feedback to the participants and used the peer-review process by the research team as well as two colleagues with experience in qualitative studies. Also, observer review was used to establish the confirmability, and interviews, codes, and classes extracted by some experienced professors in qualitative research were reviewed. In this research, to increase the credibility of the data, various strategies, such as member check and peer check (supervisor and advisor) were used.
Participants were given feedback and endorsed repeatedly during the interview when interviews were not meaningful to the researcher and the participant's purpose was not properly understood. In addition, participants were asked, either in person or by telephone, to clarify the underlying codes of their interviews and ambiguities. The full transcript of the interviews was also sent to the esteemed guides and consultants along with coding and initial classes, and their confirmatory and complimentary comments were received regarding implementation, coding, and initial grades.
Also, to increase the transferability of the results, the researcher studied the experiences of the main participants. The researcher tried to use participants from all ages, and academic, cultural, and social groups. A more accurate description of the research, participants, methodology of the research, and the results would help to make the findings more translatable. Also, peer reviews of the research co-workers and confirming the steps can enhance the transferability of the findings.
This research was derived from the approved research of the School of Public Health of Shahid Beheshti University, Tehran, with the ethical code of IR.SBMU.PHNS.1395.95 at the ninth session of the Ethics Committee on Neuroscience Research, dated Dec 31, 2016, with the tracking number of 10599. Based on the right to privacy, participants have the right to anonymity and the right to know that the data collected will be kept confidential. Thus, we have used numbers when presenting their comments and remarks.