Somebody cuts you off in traffic.
Your first thought may be, “What a jerk.”
Maybe.
But perhaps the driver is rushing to an emergency, made an honest mistake, or simply did not see you.
Psychologists call our tendency to overemphasize personality and underemphasize circumstances the fundamental attribution error.
Other people’s behavior is visible
When someone else does something rude, careless, late, or awkward, the behavior is right in front of us.
The circumstances often are not.
We see the missed deadline.
We may not see the sick child, broken car, terrible instructions, or sudden emergency behind it.
Personality becomes the easiest explanation because personality seems attached to the person we can see.
We know much more about our own circumstances
When we make the same mistake, we have the full backstory.
“I was late because traffic was terrible.”
“He was late because he is irresponsible.”
Same behavior.
Different explanation.
We automatically have access to our own context.
Does this mean personality never matters?
Of course not.
Sometimes people really are careless, rude, dishonest, or unreliable.
The point is not to excuse every action.
It is to remember that behavior usually comes from some combination of person and situation.
Why is the shortcut useful?
Quick judgments save time.
If someone repeatedly behaves badly across many situations, personality may be a reasonable explanation.
The problem comes when one visible action gets turned into a complete character diagnosis.
Where does this show up?
Workplaces.
Schools.
Driving.
Parenting.
Relationships.
Online arguments.
Any time we see the result but not the surrounding circumstances, attribution errors become easier.
What is a good correction?
Before deciding what kind of person someone is, ask:
“What situation could also produce this behavior?”
You may still decide the person deserves blame.
But now you have checked more than one explanation.
Sometimes the person is the problem.
Sometimes Tuesday morning traffic deserves some of the blame.
A related piece of human behavior appears in Why are first impressions so hard to change?, where the brain handles another everyday judgment or response.
And that’s the short explanation.
Related explanations: Why are first impressions so hard to change?, Why do we take credit when things go well?, and Why does one good quality create a halo effect?