1. A system for tracking human-digital media interaction comprising: a database storing information regarding a user's activity history for a plurality of different cognitive tasks; a computing device adapted to receive user behavior information indicating usage by a user of an interactive software program, the interactive software program associated with an at least one of the cognitive tasks, the computing device further adapted, in response to the receipt of user behavior information indicating usage by the user of the interactive software program, to update the database information regarding the user's activity history for the at least one of the cognitive tasks.