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Comparative Judgment of Familiar Objects Is Modulated by Their Size
Bert Reynvoet1,2, Helene Vos1, Avishai Henik3
11 Department of Brain & Cognition, KU Leuven, Leuven, Belgium.
Experimental Psychology
|January 15, 2019
Summary
Everyday judgments of quantity, like comparing fruit counts, are influenced by object size. This study reveals that non-numerical cues, such as size, bias our perception of numerosity.
Area of Science:
- Cognitive Psychology
- Perception Science
- Visual Cognition
Background:
- Perceptual decisions in daily life often appear effortless.
- The influence of object size on numerosity judgments, similar to dot arrays, remains under-examined in real-world contexts.
Purpose of the Study:
- To investigate whether object size biases comparative numerosity judgments in everyday scenarios.
- To determine if non-numerical cues affect the perception of quantity in homogeneous sets of objects.
Main Methods:
- Participants compared the numerosity of two homogeneous sets of fruits (apples and strawberries) varying in size.
- Reaction times and accuracy were recorded to measure the difficulty and nature of the numerosity comparison.
Main Results:
- Accuracy in determining the more numerous set was nearly perfect.
- A significant congruency effect was observed in reaction times, indicating increased difficulty when comparing sets where size and number were incongruent.
Conclusions:
- Comparative numerosity judgment in daily life is susceptible to biases from non-numerical cues, primarily object size.
- These findings highlight the pervasive influence of visual heuristics on quantity perception in naturalistic settings.
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