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Experience Dependent Object Perception

Experience Dependent Object Perception. Richard Zemel Computer Science Department University of Toronto. Introduction. Sample Stimuli. Familiarity: Methods. Training Phase: 16 stimuli, fixed locations passive viewing (6 blocks) active: old/new discrimination (2 blocks). [repeat].

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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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