“…Therefore, the utilisation of such tests certifies that the subjects of the protocol experienced stress, which can be monitored through physiological signals. In the case of non-standardised stress testing, such as those by Avdeeva et.al., Billones et.al, Castaldo et.al and Ahrens et.al, the major findings of the protocols found inconsistencies with the existing literature[32, 57,71]. This could have been caused by the elicitation of other responses through the supposed stress tasks, due to lack of standardisation and previous utilisation.…”