Adaptation biases the parallel perception of subitized numerosities
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View abstract on PubMed
Summary
This summary is machine-generated.Numerosity adaptation, previously limited to larger numbers, can affect small quantity estimation (subitizing) when estimating subsets. This challenges the distinct nature of subitizing and reveals adaptation
Area Of Science
- Cognitive psychology
- Visual perception
- Numerical cognition
Background
- Numerosity adaptation typically affects perception of moderate quantities (>4).
- Subitizing (rapid estimation of 1-4 items) is considered a distinct, non-adaptive process.
- This study explores adaptation's influence on the subitizing range.
Purpose Of The Study
- To investigate if subitizing (estimation of 1-4 items) is susceptible to numerosity adaptation.
- To determine if adaptation effects differ based on target information timing (before vs. after stimulus presentation).
Main Methods
- Participants adapted to a 50-dot stimulus.
- Stimuli with 1-5 colored dots were presented.
- Participants estimated numerosities of single sets, total dots, or subsets.
- Target color information was provided either before or after stimulus presentation.
Main Results
- No adaptation effect was observed for single sets or total dot estimation (CV < 0.05), confirming effective subitizing.
- When estimating parallel subsets, adaptation biased numerosity estimation.
- Subitizing adaptation effects (CV) correlated with moderate numerosity adaptation (5-12 dots).
- Adaptation effects were stronger when target information was revealed after stimulus presentation.
Conclusions
- Subitizing is not immune to numerosity adaptation when estimating subsets.
- Parallel subset enumeration may override subitizing, engaging general numerosity estimation processes.
- The timing of target information influences adaptation strength, suggesting adaptive weighting of prior stimuli under uncertainty.
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