“Quantitative Analysis of Purposive Systems: Some Spadework at the Foundations of Scientific Psychology“
William T. Powers
Psychological Review, 1978, Vol. 85, No. 5, 417-435
Events
IAPCT conference 2026
36th IAPCT Conference – York, UK | October 7-10, 2026 + MOL practitioners meeting, October 12+13, near Manchester Welcome to the 36th IAPCT Conference and Annual Meeting, held near the historic city of York, UK, […]
Method of Levels
Psychwire: Gaining a healthy sense of control
Warren Mansell When people feel like they aren’t in control of their lives, or they become too controlling, this can cause psychological problems. ASK expert in Perceptual Control Theory, Dr Warren Mansell, why finding the […]
Bill Powers
The Reafference Principle and Control Theory
William T. Powers …small changes convert von Holst’s model into a true negative feedback control system. lf we assume with von Holst that a similar architecture holds at higher levels in the nervous system, we […]