Conducted in 1919-1920, a nine-month-old baby was subject to a conditioning experiment to make him fear certain animals. Carried out by psychologist John B. Watson and his grad student Rosalie Rayner, ...

Where does fear come from? American psychologist John Watson wanted to find out — so, in the name of science, he tried to instill specific new fears into a baby boy he called Albert. His study ...

In his most famous and controversial experiment, known today as the "Little Albert" experiment, John Watson and a graduate assistant named Rosalie Rayner conditioned a small child to fear a white rat.