16. Validity and Reliability Guba (1994:67), one of the authority figures in the field, listed four criteria to be met to provide trustworthiness of a qualitative investigation which are credibility, transferability, dependability, and confirmability. These criteria endeavored to be met in the present research will be explained in detail. Rigour will be ensured through the development and adherence to a research audit trail (Creswell,2014:71) and having all researchers/participants participate in all stages of data collection, analysis, and interpretation.
16.1 Trustworthiness The author will determine the trustworthiness of the study by accessing data accuracy in terms of the following four criteria: dependability, credibility, transferability, and conformability (Cuba & Lincoln, 1994:67). The individual and collective qualitative research experience of the participants enhanced theoretical sensitivity.
16.2 Dependability In the framework suggested by Guba & Lincoln,1994:89) this is very similar to the concept of reliability in quantitative research: ‘It is concerned with whether the author would obtain the same results if observation is done the same thing twice’ (Paton,2015:50).To assess the dependability of the data, the information obtained from individual interviews and field notes will be carefully read by at least one member of the research team, and the results will be compared. To increase the dependability of the research, the researcher will use codes and review them several times to classify them and find the main themes and main categories. Knowledgeable participants will be selected from a large variety of majors, and the triangulation technique will be used to increase the consistency of the study. The triangulation of this study will be to evaluate the impact and effectiveness of Close Circuit Television surveillance systems for public safety and security in Rosebank and Killarney Malls, Johannesburg. As explained earlier, to deal with this matter, the researcher will use interview with the participants to get to their lived experiences with the use of CCTV for crime control and prevention. The interpretation will not be based on the researcher's preferences and viewpoints but on the ground in the data. To ensure credibility, the researcher will stay in the field until data saturation was reached to gain an in-depth understanding of specific aspects of the challenges encountered by mental health nurse specialists. To ensure the dependability of the study, the research methodology is fully articulated for replication with the same or similar participants in a similar context where the results confirm the findings in this study.