A
- Haly Abbas (Ali ibn Abbas al-Majusi)
- Lyn Yvonne Abramson
- Alfred Adler
- Mary Ainsworth
- Hagop S Akiskal
- George Albee
- Jüri Allik
- Lauren Alloy
- Gordon Allport, Personality psychology
- Adelbert Ames, Jr.
- Harlene Anderson
- John R. Anderson
- Ernst Angel
- Heinz Ansbacher
- Michael Argyle
- Solomon Asch
- Roberto Assagioli
- John William Atkinson
- Aušra Augustinavičiūtė
- Averroes (Ibn Rushd)
- Virginia Axline, Play Therapy
Read more about this topic: List Of Psychologists