To assure a reliable evidence and validity of the analysis of the four tools, the researchers discussed their different approaches, assumptions, and conclusions along the way of the investigation. Moreover, a peer debriefing technique was employed to present an analytical probing, help to discuss perspectives and assumptions on the researcher's part and also help to review with a critical view to avoid biases. Lincoln and Guba (1985) advocate the use of peer debriefing enhance the credibility, or truth-value, of a qualitative study, by providing a check on the investigation process (Lincoln and Guba 1985). First, each researcher independently gathered and analysed the data. Second, each researcher brought a different contribution of skills, values, and subjective knowledge to the research. Finally, the researchers provided feedback to each other to uncover taken for granted biases and perspectives.