English: A baby, nicknamed "little Albert," is shown initially to be unafraid of a series of animals (a monkey, a dog, a rat, a rabbit). Then in an unfilmed phase of the research, the researchers sought to create a fear response in the baby: they struck a steel bar with a hammer whenever Albert reached for the rat. The next filmed sequence shows Albert reacting with fear to the animals, as well as to Watson himself wearing an animal mask.