“…Some of the studies created tools that measure stress (De Almeida et al, 2018;Anshel 1995;Stewart et al, 2004;Jaenes et al, 2012;Anshel et al, 2013;Anshel et al, 2014), others observed stress using these tools in competitive situations Ritchie et al, 2016) or with the visualization of different stressful moves using a monitor (Anshel & Weinberg, 1995;Kaissidis-Rodafinos et al, 1997;Kaissidis-Rodafinos & Anshel, 2000). Moreover, these studies analyze the differences among referees, with regard to gender, with women being more affected , to the referee's level, with the novice referees recording the most stress (Kaissidis-Rodafinos & Anshel, 1993;Anshel & Weinberg, 1995;Ritchie et al, 2016) or the referee's nationality: Turkish (Anshel et al, 2014), Greek (Kaissidis-Rodafinos & Anshel, 2000, American and Australian (Anshel & Weinberg, 1995) and Greek and Australian (Kaissidis-Rodafinos et al, 1998). The most stressful situations for the referees in these studies were: when the referee instructor was present at the game, when there were mistakes in the officiating mechanics, when a foul has been erroneously called, when there was an injury, when there were protests by the players or coaches, and lastly, when the instant replay was used.…”