John B. Watson

In a Baltimore laboratory in 1919, a length of steel hung waiting beside a hammer. The child brought into the room was eleven months old.

They showed him a white rat. He reached for it. Behind his head, out of sight, the hammer came down.

You have met this experiment before, and almost everything you were told about it is wrong. The boy did not come to fear every white, furry thing. The animals he reacted to most were not white - the paper gives the rabbit no colour at all. Nobody ever removed the fear, and the men who caused it knew a month in advance that he was leaving. Retold across a century of textbooks, the study acquired objects the child never met and endings that never happened.

John Broadus Watson made observable behaviour the central business of American psychology, and he did it with a demand that still bites: if a claim is to count as science, someone else must be able to check it. That principle outlived every specific thing he believed. It is why his name survives.

The rest of the life is harder company. He was accused of cruelty to animals at twenty-eight and defended by his university. He lost his professorship at forty-two over an affair with his research assistant. He spent the second half of his career in advertising, selling cold cream with the authority of a scientist. And he told a generation of mothers that kissing their children was a sex-seeking response in themselves, and that mother love was "a dangerous instrument."

Inside:

• What the Little Albert paper actually says - read against the retelling, line by line
• The manifesto of 1913, and why the revolution it supposedly started converted almost nobody for years
• The four methods he proposed for removing the fear, and used on nobody
• Who Little Albert was: two named candidates, two serious camps, and no answer
• The nursery advice that reached houses - and the honest limit of what can be shown about its effects
• Advertising, persuasion, and the idea that behaviour is a lever anyone can pull
• The second allegation that is missing from almost every account of him
• What behaviourism genuinely offers once the overreach is stripped out - cues, habit, graded approach, and where each one stops
• The sentence almost nobody quotes, in which he admits he has gone beyond his facts

Also here: the rats he blinded to find out how they ran mazes; the man who never held a driving licence and slept with a light on because he was afraid of the dark; the goldfish bowl he described moving closer at every meal to cure a child's fear; and the last years spent out in a Connecticut barn with his animals.

Written for the general reader, not the seminar room. Verified sources, the disputes left open where the record leaves them open, and the criticism given its due.

Part of Pioneers of Human Behaviour - gateway books on the minds that shaped us.