Psycho-Logic is an attempt to formulate explicitly the implicit common-sense psychology embedded in everyday language and taken for granted by its users. The key concepts in this system are given definitions, and the basic assumptions are presented in the form of axioms. A number of corollaries and theorems are formally proved. The text also contains numerous notes in which the formal propositions and their broader implications are discussed. It is assumed that the relationship between psycho-logic and empirical psychology is analogous to that existing between geometry and geography....

Psychologic is a formal system and relationship within which psychological processes are defined. The language people ordinarily use to formulate, think, and talk about psychological phenomena is organized by Jan Smedslund into a set of propositions aimed at identifying the generalities which underlie human behavior. In this way, psychologic illuminates the conceptual system of psychology embedded in ordinary language. This book continues Professor Smedslund's search for stable theoretical structures to explain the meanings that are part of all psychological investigation.