Developed the concept of the collective unconscious and archetypes. Once was a friend of Sigmund Freud's.

• William James
• Karen Horney
• Carl Jung
• Abraham Maslow

Founder of Individual
Psychology who developed
the idea of “striving for
superiority” and the
“inferiority complex”

• Alfred Adler
• Sigmund Freud
• Jean Piaget
• Paul Broca

He was awarded a
Nobel Prize for work in the
area of digestion,
discovered that animals
could learn to respond to
completely arbitrary
stimuli (bells).

• Ivan Pavlov
• William James
• BF Skinner
• Lawrence Kohlberg

He wrote The Principles of Psychology, but he is most famous for his theory of emotions with
Carl Lange.

• Lawrence Kohlberg
• Abraham Maslow
• William James
• John Watson

He was the founder of
the psychoanalytic
school of psychology
through his development
of the id, ego, and
superego.

• Sigmund Freud
• Jean Piaget
• Alfred Binet
• Abraham Maslow

He developed an 
eight-stage theory of
psychosocial development beginning with
trust versus mistrust.

• Erik Erikson
• Abraham Maslow
• Jean Piaget
• Alfred Binet

This behaviorist is one of the
most influential psychologists
of the late 20th century. He
advocated the idea that
behavior is controlled by
reward and consequences. 

• Lawrence Kohlberg
• Carl Rogers
• Hans Seyllye
• BF Skinner

He developed a theory
of moral development
including pre-conventional, conventional and post-conventional.

• Lawrence Kohlberg
• Abraham Maslow
• Erik Erikson
• Jean Piaget

He developed a
form of therapy called
client-centered
therapy, which stresses
humanistic ideas such
as positive personal
growth.

• Abraham Maslow
• John Watson
• Carl Rogers
• Albert Bandura

A French surgeon who proposed that the
production of speech is controlled by the left
side of the human brain in an area later named after him.

• Paul Broca
• Karl Wernicke