1.     Gazzaniga or Sperry


Involved with split-brain, when the corpus callosum is severed to some degree. They worked together at Caltech while testing the functioning of each hemisphere independently of the other in split-brain patients.

2.     Gibson and Walk




They hypothesized that depth perception is inherent as opposed to a learned process. In order to test this, they put 36 infants on the shallow side of the visual cliff apparatus and saw if the child would cross over to their parents.

3.     Gordon Allport



Contributed to the formation of Values Scales and rejected both the psychoanalytic approach to personality and the behavioral approach.

4.     Harry Harlow



He was best known for his maternal-separation, dependency needs, and social isolation experiments on rhesus monkeys.

5.     Harry Stack Sullivan



An American Neo-Freudian psychiatrist and devoted his years of clinical research to help people with psychotic illness.

6.     Henry Murray



Introduced psychoanalysis into the Harvard curriculum and aided in the founding of the Boston Psychoanalytic Society.

7.     Hermann Rorschach

Known for the development of the projective test, the Rorschach inkblot test. The test was meant to reflect unconscious parts of the personality.

8.     Hans Eysenck

Known for his work on intelligence and personality as well as his work with behavior therapy.

9.     Hobson and McCarley


Proposed the activation-synthesis hypothesis, which is a neurobiological theory of dreams that states dreams result from brain activation during REM sleep.

10.  Holmes and Rahe



Developed the Holmes and Rahe stress scale, which is a list of 43 stressful life events that can contribute to illness.

11.  Howard Gardner





Known for his theory of multiple intelligences, which divides intelligence into specific “modalities” instead of seeing intelligence as dominated by a single general ability.

12.  Ivan Pavlov




Known for his work with classical conditioning and his experiment with the gastric function of dogs.

13.  Jean Piaget


Developed theory of cognitive development, which is comprised of four stages.

14.  John B. Watson



Known for his “Little Albert” experiment, in which Watson was testing to see if he could make a child fear a stimulus that would normally not be feared. Also known as a supporter of behaviorism.

15.  Judith Lang Lois



Known for coining the term “koinophilia”, which states when sexual creates seek a mate, they prefer that mate not to have any unusual, peculiar, or deviant features.

16.  Karen Horney



Known for founding Feminist Psychology as a response to Freud’s theory of penis envy and is known as a Neo-Freudian.

17.  Karl Wernicke





Known for his study of language deficits caused to Broca’s area and found that damage to the left posterior resulted in deficits in language comprehension, now known as Wernicke’s area.


18.  Kenneth Clark





African-American psychologist known for conducting research with his wife, Mamie Clark. Together, they conducted research among children and were also active during the Civil Rights Movement. Kenneth was the first black president of the American Psychological Association.

19.  Kurt Lewis



Often recognized as the “founder of social psychology,” Lewis was one of the first to study group dynamics and organizational development.

20.  Langer and Rodin


Studied the effects of allowing personal decision making among nursing home residents.

21.  Lawrence Kohlberg



Known for his theory of stages of moral development. He extended Jean Piaget’s account of children’s moral development from twenty-five years earlier.

22.  Leon Festinger


Best known for cognitive dissonance and social comparison theory.

23.  Lev Vygotsky




Known cultural-historical psychology and his concept of the Zone of Proximal Development, which is the difference between what a learner can do without help and what they can do with help.

24.  Lewis Terman


Known as a pioneer in educational psychology and for his revision of the Stanford-Binet IQ test.

25.  Little Albert


A case study in which a little child was conditioned to fear a stimulus that is not scary.

26.  Konrad Lorenz


Often considered the founder of modern ethology, the scientific study of animal behavior.

27.  Martin Seligman



Known for his concept of learned helplessness, in which an organism is repeatedly subjected to an aversive stimulus that it cannot escape.

28.  Mary Ainsworth


Known for her work in early emotional attachment as well as her work in the development of attachment theory.

29.  Mary Cover-Jones


Behavior psychologist who developed a technique known as desensitization to cure phobias.

30.  Masters and Johnson



Research team who conducted research on human sexual response and the treatment of sexual disorders and dysfunctions.  

31.  Noam Chomsky




Worked in the field of linguistics and has had work that has influenced fields such as artificial intelligence, cognitive science, computer science, and political science.