A brutal killing led to the naming of the phenomenon known as Bystander Effect.
Albert Bandura's experiment in 1961 exposed the dangers of imitative behaviour.
Lawrence Kohlberg's experiment to quantify the human capacity for ethical reasoning.
When Philip Zimbardo set up a mock prison, he had no idea what he would witness.
Claudia Hammond looks at Hans Eysenck's studies of introvert and extrovert personalities.
Claudia Hammond looks at Mary Ainsowrth's research on the parent-child relationship.
Claudia Hammond profiles JB Watson, the psychologist considered the father of behaviourism
Claudia Hammond looks at memory and the Chinese whispers experiment by Frederic Bartlett.
Claudia Hammond asks if Jean Piaget's findings about children's egocentrism are accurate.
Claudia Hammond looks at the conformity experiments of social psychologist, Solomon Asch.