Even though the study had many parameters and a relatively small sample, the number of interactions was high and the triangulation in different phases (data gathering and data analyses) increases the credibility and validity of the results. As it was also mentioned, both in T1 and T2 phases groups, among the sample were students that would participate for ethical and educational reasons, but were not included to the final analyses due to having severe intellectual disability and autism. However data gathered by this sample were in occurrence with their peers and findings will be discussed in a future paper.