“…If, on one hand, some programs show positive results 26,27,32,33,35,37,39,43,47 , others do not reveal significant differences between the group that participated in the intervention and the group that did not receive intervention 20,28,42,52,54 . Some authors state that mixed results are due to either differences in terms of indicators and measures used in the assessment 17,22,66,65 or the success and efficacy definition 67 . In the analysed studies there is a multitude of parameters and assessment measures that can constrain the assessment of the efficacy.…”