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Published on: March 18, 2019
The role of attention in subitizing
Henry Railo1, Mika Koivisto, Antti Revonsuo
1Department of Psychology, University of Turku, Finland. henry.railo@utu.fi
Cognition
|October 10, 2007
Summary
Subitizing, or rapidly enumerating items without counting, relies on attention. Even small numbers require attentional resources, with accuracy increasing as attention becomes available.
Area of Science:
- Cognitive Psychology
- Visual Perception
Background:
- Subitizing, the rapid enumeration of small quantities, is traditionally linked to preattentive processing.
- The role of attentional processes in subitizing small numbers remains debated.
Purpose of the Study:
- To directly compare preattentive and attentive models of subitizing.
- To investigate the influence of attentional resource availability on enumeration accuracy.
Main Methods:
- Utilized an inattentional blindness paradigm to manipulate attentional resources.
- Presented items for enumeration unexpectedly during a concurrent line length task.
- Included divided- and full-attention conditions for comparison.
Main Results:
- Accurate enumeration was limited to quantities of one and two under minimized attention.
- Increased attentional resources significantly improved enumeration accuracy, even for number two.
- Enumeration accuracy demonstrated a positive correlation with available attentional resources.
Conclusions:
- Subitizing small quantities is not purely preattentive; it engages attentional mechanisms.
- Attentional demands for enumeration escalate with the number of objects presented.
- Findings challenge purely preattentive models and support a role for attention in subitizing.
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