Theorists
- Alfred Adler
- Gordon Allport
- Albert Bandura
- Aaron Beck
- Raymond B Cattell
- Albert Ellis
- Erik Homburger Erikson
- Hans Eysenck
- Viktor Frankl
- Anna Freud
- Sigmund Freud
- Erich Fromm
- Karen Danielson Horney
- Carl G Jung
- George Kelly
- Melanie Klein
- Abraham Maslow
- Rollo May
- Walter Mischel
- Henry A Murray
- Fritz Perls
- Otto Rank
- Carl Rogers
- Burrhus Frederic Skinner