International Series of Monographs in Experimental Psychology, Volume 8: The Genesis of the Classical Conditioned Response presents an introduction to the study of conditioning and conditioned response. This book discusses the stimulus properties that are necessary to conditioning. Organized into seven chapters, this volume begins with an overview of the effects of stimuli after processing by the nervous system. This text then outlines the extensive nature of response change during conditioning and explains the modifications that occur in the unconditioned response prior to conditioning. Other chapters consider the relevance of the analysis of background activity on the conditioning process. This book discusses as well the stimulus factors that are likely to affect or determine unconditioned response elicitation, the nature of unconditioned response, and associated events such as feedback and arousal effects. The final chapter deals with the unified view of conditioning. This monograph is a valuable resource for psychologists and physiologists.