Comparison
Just-World Hypothesis vs Fundamental Attribution Error
Main difference in one sentence
Just-World Hypothesis assumes outcomes reflect what people deserve, while Fundamental Attribution Error explains behavior too much through character and not enough through context.
Brain Shortcuts that Tilt Judgment
Cognitive Biases
Just-World Hypothesis moralizes outcomes. It makes hardship feel deserved and success feel earned even when luck, injustice, and systems play a major role.
People Mistakes
Social Perception Errors
Fundamental Attribution Error misreads behavior. It treats one action as proof of character while ignoring situational pressures and missing context.
Example where people confuse them
A student arrives late and a teacher says it proves the student is irresponsible. That is Fundamental Attribution Error because one behavior is being explained through character instead of context. If someone then says the student's later academic struggles must also reflect what they deserve, that shifts into Just-World Hypothesis because the whole outcome is being treated like a moral verdict.
Quick memory trick
Fundamental Attribution Error says, "That action reveals who they are." Just-World Hypothesis says, "That outcome reveals what they deserve."