Reading focus
Syllabus: How Can We Study the Mind?
Compare availability of visual information with reported noticing. Use the differences among conditions to ask how the observer’s task shapes selection.
A question to consider. If the unexpected event becomes part of the announced task, why would that change what the experiment can tell us about inattentional blindness?
Why this reading
An event can be visible in a scene yet go unreported by a person concentrating on another task. This study makes attention an explanatory question by varying what participants track and what unexpectedly appears.
Before you read
Inattentional blindness concerns failure to notice an unexpected event while attention is engaged elsewhere. It differs from change blindness, which concerns noticing a change. A surprise question after the task measures reported noticing; it is not a complete measure of every stage of processing.
Read for
- Map the variations in the counting task, attended team, unexpected event, and display to the comparisons they enable.
- Examine how noticing varies with task demands and the relation between the attended and unexpected objects.
- Consider participant exclusions, prior familiarity, and the timing of the questions when judging what the results can establish.
Consider afterwards
- A person misses an unexpected sign while searching a display. How would you distinguish a problem of visibility from a consequence of the assigned search task?
Editorial context
The often-repeated demonstration is only one part of a study comparing several conditions. There is no single universal percentage of people who will miss an unexpected event. Because surprise and prior knowledge matter, familiar viewers are not equivalent to the original participants. Reported noticing also leaves questions about unreported processing unresolved.