Selective perception
We notice, interpret, and remember what fits our expectations and interests, filtering out the rest.
What it means
Selective perception is the tendency for expectations, motives, interests, and prior beliefs to shape what people notice and how they interpret ambiguous information, so that the same situation is literally seen differently by different observers. It is broader than selective exposure, which concerns which information people choose to seek or avoid; selective perception operates on information already encountered, biasing attention toward expectation-consistent details and skewing interpretation of anything ambiguous to fit existing frames. The mechanism is top-down: perception is an active, theory-laden construction in which schemas and goals guide what is foregrounded and how gaps are filled, which is why partisans watching the same event each see the other side as the offender. It contributes to confirmation bias, stereotyping, and entrenched disagreement, because contradictory cues are downweighted or reinterpreted rather than registered at face value. The classic demonstration showed fans of rival teams perceiving the same rough football game as having been played fairly by their own side and dirtily by the opponent. It matters because it shows disagreement often begins not at the level of reasoning but at the level of perception itself.
Examples
Students from two rival colleges shown the same film of a contentious football game each 'saw' far more penalties committed by the other team—the same footage, two different perceptions.
Two managers leave the same meeting certain of opposite things: one saw a team raising fair concerns, the other saw obstruction — same room, same words.
A parent convinced their child is shy reads a quiet afternoon as proof of it, while the teacher, expecting focus, watches the same hour and sees concentration.
First described in Hastorf & Cantril (1954).