Heather Bell´s PCT simulation of distance control in rival animals

Dag Forssell “When i first learned of PCT about seven years ago, I read everything I could get my hands on and your articles, for me, most clearly explained PCT. Somehow, your unique use of […]

36th IAPCT Conference – York, UK | October 7-10, 2026 + MOL practitioners meeting, October 12+13, near Manchester We’re excited to announce that the 36th IAPCT Conference and Annual Meeting will take place near the […]

“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