This document is the introduction and instructions for the Imaginal Processes Inventory, a questionnaire about inner experiences like images, dreams, and daydreams. It was created by Jerome L. Singer and John S. Antrobus of the Center for Research in Cognition and Affect. The inventory consists of two parts, with Part I containing 24 questions about daydreaming and dream habits, and Part II containing 320 additional questions to indicate how well statements apply to the respondent. Respondents are assured their anonymity will be protected in using and analyzing the results of the inventory.