| # PolyCAT Data Card
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| ## Dataset Summary
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| | Property | Value |
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| |----------|-------|
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| | **Name** | PolyCAT (Polygon-Aperture Eye-Tracking Dataset) |
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| | **Version** | 1.0 |
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| | **License** | CC BY 4.0 |
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| | **Modality** | Eye tracking (gaze position, fixations, pupil size) |
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| | **Task** | Free viewing with polygon aperture constraint |
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| | **Size** | ~3 GB (raw) + ~12 GB (processed gaze) |
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| | **Participants** | 30 included |
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| | **Trials** | 21,026 total |
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| | **Stimuli** | 600 CAT2000 images x 27 polygon apertures |
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| ## Intended Use
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| - Saliency prediction under geometric viewing constraints
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| - Gaze modeling and scanpath prediction
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| - Study of visual attention allocation in aperture-constrained viewing
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| - Benchmarking saliency models with non-rectangular viewing regions
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| ## Data Collection
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| ### Hardware
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| - EyeLink 1000+ (SR Research), head-mounted, binocular at 500 Hz per eye
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| - 27" 4K monitor (3840 x 2160) at 144 Hz, 70 cm viewing distance
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| ### Participants
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| - 30 participants, all included
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| - Ages 24-29, 14 female / 16 male
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| - Normal or corrected-to-normal vision
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| - University students
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| ### Task
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| Participants viewed CAT2000 images through irregular polygon apertures for 4 seconds each, with a secondary old/new memory task after each block.
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| ### Stimuli
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| - 600 images from 6 CAT2000 categories: Fractal, Object, OutdoorNatural, Random, Satelite, Sketch
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| - 27 polygon aperture shapes with systematically varied geometric properties
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| - 9 fixation cue positions (3x3 grid)
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| ## Ethical Considerations
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| - Study approved by institutional ethics board
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| - All participants provided informed consent
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| - Data is de-identified: no names, no identifying images, university IDs removed
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| - Demographic data limited to age and gender
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| ## Known Limitations
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| - P05 Part B has 317/351 trials (34 trials missing due to technical issues)
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| - Some sessions required restart (split sessions), handled by concatenation
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| - Stimulus images are from CAT2000 and subject to its original licensing
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| - Polygon apertures may introduce edge artifacts at aperture boundaries
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| ## Citation
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| See README.md for citation information.
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