This article reviews theoretical and empirical work on absorption and the relationship of absorption with selected variables. Absorption is denned as a characteristic that involves an openness to experience emotional and cognitive alterations across a variety of situations. The nature and assessment of absorption, and the relationship of absorption with (a) hypnosis and hypnotizability, (b) imagery, daydreaming, and consciousness, and (c) attentional processing and psychophysiological responding is considered. Conceptual and methodological issues are examined, and directions for future research are specified. Absorption is argued to be central to an understanding of the nature of subjective experience as well as to aspects of cognition and behavior.We are grateful to the anonymous reviewers for their detailed comments on an earlier version of this article. Final preparation of this article occurred when Kevin M. McConkey was visiting the University of Arizona.