• Quick guide to PCT

    Quick guide to PCT

    Perceptual Control Theory (PCT) has been around for over 50 years, leaving a trail of papers, books, websites, posts, conversations, videos all over the web. This is a quick guide to get started with the most basic materials: introductory texts, books, demonstrations, papers, websites and finding others interested in PCT. Welcome! [...]
  • PCT in 11 steps - introduction by Bill Powers

    PCT in 11 steps - introduction by Bill Powers

    Control is a process of acting on the world we perceive to make it the way we want it to be, and to keep it that way. Examples of control: standing upright; walking; steering a car; scrambling eggs; scratching an itch; knitting socks; singing a tune. Extruding a pseudopod to absorb a nanospeck of food (all organisms control, not only human beings). The smallest organisms control by biochemical means, bigger ones by means of a nervous system. [...]
  • A simple introduction to PCT

    A simple introduction to PCT

    A simple start… PCT stands for Perceptual Control Theory. Big words, eh? The ‘big idea’ behind PCT is simple but don’t be surprised if it takes a while to get your head around. This is it…. ‘Behaviour is the control of perception’ That’s it. Or more simply, we do things to get what we want – now that sounds too simple! Let’s take it a step at a time… [...]
  • Once around the loop

    Once around the loop

    Elements of the control loop have been labeled slightly different by different people at different times and for different purposes, whether for a very plain explanation or for more mathematical treatment of the physical functions. Dag Forssell describes the elements of the control loop step by step, as an introduction to the basics of PCT. [...]

@IAPCT Twitter

Excited to see the cover of our book that's due for publication later this year. Written by experts by experience and clinical-academics, it considers how we can make MH services more effective and humane using Perceptual Control Theory principles. @VyvHuddy @warrenmansell

truly random thought: any chance that QRI’s symmetry theory of qualia provides a satisfying synthesis / unification of Perceptual Control Theory and Interaction Ritual Chains?

cc @RomeoStevens76

In memoriam: Martin Taylor - IAPCT / In Memoriam - IAPCT

A personal account that recognises Martin’s past, and future, achievements in the expansive, integrative and transformative application of PCT to the self & society. http://discourse.iapct.org/t/in-memoriam-martin-taylor/16040

Such a lovely start to the week drinking coffee in the sunshine while reading the new #pct interdisciplinary handbook 👌🏼
Tom Scholte

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Applications of Perceptual Control Theory

Economics & Marketing

Economics & Marketing

To manage a successful business, you need to know what people want, how your business is perceived, and how to deal with people. It’s ripe for a PCT approach! […]

Sociology & Philosophy


At present, the application of PCT to Law is at its early stages. Hugh Gibbons is one exception. He has co-authored a biological model of human rights based around the tenets of PCT and he also illustrates a case using PCT in this book, “The Death of Jeffrey Stapleton”, published online. […]

Psychology & Mental Health


In explaining how living things control their perception, PCT is clearly highly relevant to psychology. Contemporary articles are making the case to the wider establishment that closed-loop, circular causality is much closer to how living systems actually function than the approach researchers still use. […]

environment clouds
Sociology & Philosophy

Environmental Stability

A comprehensive introduction to PCT and its implications for the social and physical environment, on a global scale, are described in an online article by Kent McClelland. There are also a number of online articles that relate […]

Random Selection of books about PCT


Understanding and Changing the Things You Do

“Wow.  I am impressed with this book!  It is comprehensive, neatly structured, and provides a great scientific context for introducing Perceptual Control Theory to the layperson.  The explanation builds up gradually over the chapters.  Fantastic.” – Warren Mansell, DPhil, DClinPsy, CPsychol […]

PCT Playlist



PCT and MOL on Spotify