A determination apparatus includes one or more memories, and one or more processors configured to perform, on the basis of data detected by a sensor that measures a first user who operates a first avatar, detection of a first behavior of the first user, determine a first type of behavior corresponding to the detected first behavior by referring to information indicating correspondence between a plurality of behaviors and a plurality of types of behavior, and perform, on the basis of a behavior tendency of the first user determined in accordance with the first type of behavior, control of an output to an environment where the first avatar exists.