A judgment ability calculation apparatus calculates a judgment ability of a player of a video game. The judgment ability calculation apparatus includes: a biological information obtainer configured to obtain biological information relating to the player in linkage with time information; a first calculator configured to calculate a time change in an internal state of the player on the basis of the biological information; an extractor configured to extract an event of attention in linkage with time information; and a second calculator configured to extract an internal state of a predetermined period including a timing at which the event of attention occurs from the time change in the internal state on the basis of the time information linked with the event of attention, the second calculator being configured to calculate the judgment ability of the player from the extracted internal state.
JUDGMENT ABILITY CALCULATION APPARATUS