The Domain of Cognition is a taxonomy for planning, sequencing, and implementing instruction, which covers the entire range of cognitive and cognitive-affective learning and behavior. Students acquire, learn, and use information on eight hierarchically and sequentially arranged levels of complexity. The levels and their corresponding abilities are: (1) preparation and observation--receive cues; (2) reception--acknowledge that information is received; (3) transformation--assign meaning to and use information; (4) retention--demonstrate information which can be recalled from memory; (5) transfersion--form new information, based upon guidelines retrieved by the individual who is cued to use them in a particular situation; (6) abstraction--use guidelines to solve problems without being obviously cued; (7) organization--arrange and prioritize abstractions; and (8) generation--integrate two or more abstractions to create a completely new one. Unlike other taxonomies (such as Bloom's or Krathwohl's), the Domain of Cognition recognizes 21 processes and procedures which take place at every level of difficulty, and specifies the importance of guidelines and cues. (CP)