Electronic game machine, data processing method in electronic game machine and its program and storage medium

The following processing steps are performed: 1) processing for determining the behavior of a player character and specifying a first coefficient relating to that behavior; 2) processing for determining the current position of the player character in a virtual space and specifying a second coefficient relating to the environment defined at that position; 3) processing for specifying the conspicuousness of the player character on the basis of the first and second coefficients; and 4) processing for judging whether or not an enemy character has detected the player character, on the basis of the conspicuousness.