 | Mack and Rock formalize inattentional blindness — when attention is engaged elsewhere, obvious stimuli never enter conscious experience. The gorilla experiment is not a party trick; it is evidence that seeing and noticing are different operations. Mack, A., & Rock, I. First published 1998 - Reprint (2000) · MIT Press · ISBN 9780262632034 |
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Key principles
- Attention gate — Conscious perception requires attention — rich visual input alone is insufficient.
- Inattentional blindness — Fully visible, unexpected objects are often not reported when attention is absorbed by another task.
- Not sensory deficit — The limit is selection, not eye hardware — the world is broader than the noticed world.
- Change blindness cousin — Large scene changes also go unnoticed without focused comparison — stability is partly constructed.
- Task load matters — Harder primary tasks widen the blindness window — overload shrinks the noticed field.
- Pop psychology caution — Reticular activating system slogans oversimplify — this volume is the lab spine for filter language.
Core science
Mack and Rock synthesize a program of experiments showing that attention is necessary for conscious detection of unexpected events — challenging naive realism about everyday awareness. Later work on change blindness and multiple-object tracking extends the same family. Pair with Judgment Under Uncertainty when the failure is availability — what did not register cannot be weighed.
Application
Reach when a member insists they saw everything but missed the cue that mattered — or when attention design is the lever, not character. Open Reticular Activating System on the Atlas shelf for the operational filter map.