This selection of papers from Kenneth Craik, explores the measurement of perception, sensory physiology and the relationship of nervous function to machines.Kenneth Craik was one of the first psychologists to realise that the machines of his and our day share some of the principles of functioning with brains. The selection includes the draft for a book on the Mechanism of Human Action with important ideas on learning, thinking, decision-making and on models of brain mechanism.Kenneth Craik was one of the first psychologists to realise that the machines of his and our day share some of the principles of functioning with brains. The selection includes the draft for a book on the Mechanism of Human Action with important ideas on learning, thinking, decision-making and on models of brain mechanism.In his brilliant and tragically brief career, Kenneth Craik anticipated certain ideas in biology and psychology which have since his death found wide acceptance. Craik was one of the first to realise that the machines of his and our day share some of the principles of functioning with brains. Kenneth Craik was killed in an accident in 1945 and left a large number of unpublished papers, a selection of which have here been sorted and edited by Dr Stephen L. Sherwood. The selection includes the draft for a book on the 'Mechanism of Human Action' with important ideas on learning, thinking, decision-making and on models of brain mechanism. There is also fascinating material on the measurement of perception, sensory physiology and the relationship of nervous function to machines. There are some philosophical discussions and a few introspective comments.Editor's notes; Introduction; Obituary notices by Sir Frederic Bartlett, F. R. S.; Part I. Analytical and Causal treatments of Perception (Epilogue from the PhD Thesis): Part II. The Mechanism of Human Action: 1. Introductory; 2. Principles of automatic regulation and servo-mechanisms; 3. Review of synthetic principles and their al£|