Watch for
Your recollection of contributions being higher than others recollections.
Outcome & SelfBias #128
Egocentric Bias
We overestimate our own contribution.
The tendency to overestimate ones own role importance or contribution to a past event or collaborative project.
Why it matters: One of the most consistent findings in group dynamics research.
Try this
Keep records of actual contributions rather than relying on memory.
Real-world example
After a group project each member estimates they contributed more than 100% when contributions are summed.
Key researchers
Michael Ross, Fiona Fiske
First described in 1980
Psychological mechanism
Encoding asymmetry and self-enhancement. Our own contributions are more salient and better encoded in memory than others. We also have a motivated tendency to see ourselves as impactful.
Seminal research
Michael Ross and Fiore Sicoly (1979), "Egocentric biases in availability and attribution."
Related Biases
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
Egocentric bias is not vanity — it is an information asymmetry. You experience your own effort vividly while others contributions are less salient. The sum of self-estimates always exceeds 100% because each person is anchored to their own perspective.
Sources
Original ResearchRoss and Sicoly (1979) — Egocentric bias
EducationalAPA Dictionary entry