S
- Jeanne Safer, psychotherapy
- Eleanor Saffran
- Tamaki Saitō
- Virginia Satir
- Shlomo Sawilowsky, psychometrics, construct validity for the Multitrait-multimethod matrix
- Daniel Schacter
- Stanley Schachter, affiliation studies, Two-factor theory of emotion
- Roy Schafer
- K. Warner Schaie
- Edgar Schein
- Gunter Schmidt
- Kirk Schneider, existential-integrative therapy
- Erich Schröger
- Walter Dill Scott
- Martin Seligman, learned helplessness, positive psychology
- Francine Shapiro, founder of EMDR
- Tamara Sher
- Sara Shettleworth
- Hunter B. Shirley
- Morita Shoma
- Volkmar Sigusch
- Herbert A. Simon, Nobel Prize in Economics
- Theodore Simon
- B. F. Skinner, founder of Radical behaviorism
- Paul Slovic
- Stanley Smith Stevens
- Charles Spearman
- Elizabeth Spelke
- Sabina Spielrein
- Robert Sternberg
- Saul Sternberg
- Paul Stevenson
- George M. Stratton, founder of UC Berkeley's department of psychology
- Harry Stack Sullivan
- Carl Stumpf
- William Swann
- José Szapocznik
Read more about this topic: List Of Psychologists