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Experience Dependent Object Perception

This study investigates how previous experience with objects affects memory and perception in visual tasks. It involves training phases with passive and active viewing of stimuli, followed by testing phases that evaluate old/new discrimination, familiarity, and accuracy. Through various methods, including reference-frame variations and occlusion tasks, the research aims to determine the relevance of experience when objects may not be critical to task completion. Key findings suggest that the properties of objects in memory can significantly depend on the viewer's past interactions with them.

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Experience Dependent Object Perception

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  1. Experience Dependent Object Perception Richard Zemel Computer Science Department University of Toronto

  2. Introduction

  3. Sample Stimuli

  4. Familiarity: Methods • Training Phase: 16 stimuli, fixed locations • passive viewing (6 blocks) • active: old/new discrimination (2 blocks) • [repeat] • Testing Phase (2 blocks) • new trials -- 16 distractors • old trials -- half of learned objects: • stay in learned location • shift to diagonally-opposite location

  5. Familiarity: Accuracy

  6. Familiarity: RT

  7. Naming: Methods • Training Phase [8 rounds]: 8 named objects • passive [2 blocks]: (160 ms) GIX(500 ms) • active [1 block]: (160 ms) keyboard (feedback) • Testing Phase [6 rounds]: half shift sides, half stay • passive [2 blocks] • active [1 block]: (no feedback)

  8. Naming: Accuracy

  9. Reference-Frame: Variations

  10. Reference-Frame: Methods • Training Phase [2 rounds]: 16 objects • passive [6 blocks]: • active [2 blocks]: old/new(f-back) • Testing Phase: same/different retinal & screen locs • active [2 blocks]: old-new

  11. Experience Dependence When Objects Irrelevant? • Many properties of objects not invariant, but rather depend on experience • Evidence from experiments in which object memory directly relevant to task • Is experience important when the object is unnecessary to accomplish task?

  12. Object attention & occlusion

  13. Object attention sensitive to layout

  14. Object attention & experience

  15. Experience affects object attention

  16. Completion without occluder? Subjects complete fragments given experience with potential linking shape: Is evidence of occlusion required?

  17. Occlusion w/o occluder: Methods • Phase 1: Ends displays • Phase 2: V displays • Phase 3: Ends and Vs

  18. Missing Occluder: Results

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