Watch for
Using your own taste as the default explanation for other people.
Social & PerceptionBias #16
Projection Bias
We assume others see the world as we do.
The tendency to assume that others share our current beliefs, attitudes, preferences, and emotional states, even when they have different information or perspective.
Why it matters: Important in negotiation, marketing, and management — assuming shared preferences leads to poor decisions.
Try this
Check assumptions directly instead of inferring them from yourself.
Real-world example
A manager assumes everyone wants the same reward structure they personally prefer.
Key researchers
Lee Ross, Robert E. Nisbett
First described in 1977
Psychological mechanism
Egocentric Anchoring. Our current internal reality (hunger, anger, political worldview) is so vivid and immediate that the brain uses it as an immovable mental anchor. When trying to simulate what another person thinks or what our future self will want, the brain fails to adjust sufficiently away from that anchor.
Seminal research
George Loewenstein, Ted O'Donoghue, and Matthew Rabin (2003) in their paper "Projection Bias in Predicting Future Utility" published in the Quarterly Journal of Economics.
Below is a realistic scenario. Read it, then choose what you would do. The feedback will show whether a cognitive bias influenced your choice — not to judge, but to reveal the pattern in action.
Thought Experiment
This experiment places you in a realistic decision. Your instinctive choice will reveal whether bias is at work.
STEP 1 → ReadSTEP 2 → ChooseSTEP 3 → Reveal
Debrief
Projection bias is natural because our own mental state is the most vivid information we have. The error is treating our own perspective as representative. The fix is simple and powerful: instead of inferring, ask. Anonymous channels work best because they remove social desirability bias.
Sources
Original ResearchRoss, Greene & House (1977) — False consensus effect
Original ResearchLoewenstein, O'Donoghue & Rabin (2003) — Projection bias
EducationalAPA Dictionary entry