Vlasenko, Andrej

The article presents the results of an experiment during which the participants were playing an online game (poker), and while playing the game, a special video cam was recording the diameters of the player’s eye pupils. Diameter data and calculations were based on these records with the aid of a computer program; then, diagrams of the diameter changes in the players’ pupils were created (built) depending on the game situation. The study was conducted in a real life situation, when the players were playing online poker. The results of the study point out the connection between the changes in the psycho-emotional state of the players and the changes in their pupil diameters, where the emotional state is a critical factor affecting the operation of such systems.