Robert Rosenthal

An American social psychologist whose work showed how subtle expectations can shape performance, interaction, and research outcomes.

• Signature vocabulary: expectancy effects, Pygmalion effect, experimenter bias, nonverbal communication.
• Worldview: Human behavior is powerfully shaped by social expectations that are communicated even when they are barely noticed.
• Likely reading of common emotional problems: He would ask how cues from authority, context, and expectation are helping produce the very outcomes people believe they are merely observing.
• This figure is best approached through the lens of social psychology.

Observant, methodical, and finely tuned to subtle cues that shape outcomes before anyone notices.

• expectancy effects
• experimenter bias
• nonverbal cues
• Pygmalion effects in performance
• situational influence
• groups and norms
• identity and comparison
• perception of others
• Pygmalion effect
• nonverbal communication

• Expectancy effects are real but vary by context, and some applications show smaller effects than popular retellings suggest.
• Findings from classrooms and laboratories do not automatically generalize to every real-world performance setting.

• Expectations leak through the smallest cues.
• You may be producing the outcome you think you are discovering.
• Watch the signal before you judge the person.

• Pygmalion in the Classroom
• Experimenter Effects in Behavioral Research
• Meta-analytic and nonverbal communication studies