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Using eye-tracking to parse object recognition: Priming activates primarily a parts-based but also a late-emerging
Peter Gerhardstein1, Sarah Olsen2
1Department of Psychology, Binghamton University-SUNY, Binghamton, NY, 13902, USA. gerhard@binghamton.edu.
Attention, Perception & Psychophysics
|May 13, 2020
Summary
Object recognition relies on processing object parts, not just features. This study used eye-tracking to show that while parts-deleted images prime quickly, features-deleted images initially prime equally but later differentiate, supporting structural descriptions.
Area of Science:
- Cognitive Psychology
- Visual Perception
- Computational Neuroscience
Background:
- Previous research suggested object priming occurs at the level of object parts, not individual features, supporting structural description theories.
- The original studies utilized naming response tasks, yielding specific conclusions about priming effects for parts-deleted versus features-deleted stimuli.
- The role of visual-level priming versus non-visual object concept priming was previously explored.
Purpose of the Study:
- To investigate the temporal dynamics of object priming using an eye-tracking approach.
- To re-examine the findings of Biederman and Cooper (1991) regarding parts-based versus features-based object representations.
- To explore the interplay between global (parts) and local (features) levels of visual object processing over time.
Main Methods:
- Adaptation of an eye-tracking methodology to monitor visual attention during object priming tasks.
- Presentation of parts-deleted and features-deleted visual stimuli to participants.
- Analysis of eye movements to determine the time course of priming effects and perceptual discrimination.
Main Results:
- Parts-deleted images demonstrated rapid and exclusive priming of themselves, consistent with prior research.
- Features-deleted images initially attracted equal attention to themselves and their 'complementary' versions.
- Over time, participants viewing features-deleted images showed a divergence in attention, indicating discrimination between versions.
Conclusions:
- The findings support the primacy of structural parts descriptions in early stages of object recognition.
- Evidence suggests the existence of multiple, interacting representational systems, encompassing both global and local visual information.
- The temporal dynamics revealed by eye-tracking offer nuanced insights into the hierarchical processing of visual objects.
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