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Related Experiment Video

Updated: Nov 18, 2025

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Scan path during change-detection visual search.

Srikrishnaraja Mahadas1, Courtney Semkewyc2, Shradha Suresh2

  • 1Department of Electrical and Computer Engineering, Rutgers University, Piscataway, NJ, USA.

Computers in Biology and Medicine
|February 9, 2021
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Summary
This summary is machine-generated.

Analyzing eye movement scan paths reveals how top-down and bottom-up processing influence change detection. An optimal scan path balances visual concentration and exploration for improved accuracy and faster detection.

Keywords:
Bottom-upBoxes viewedChange detectionConcentrationDetection speedEye fixationGazeRecorderScan pathTop-down

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Human-computer interaction

Background:

  • Perception is influenced by expectations and cognitive processes.
  • Eye movement scan paths may indicate cognitive processing strategies like top-down or bottom-up processing.

Purpose of the Study:

  • To investigate the relationship between eye fixation scan paths and cognitive processing during change detection.
  • To determine if scan path characteristics correlate with detection speed and accuracy.

Main Methods:

  • Seven subjects participated in change-detection trials using MATLAB-presented images.
  • GazeRecorder software tracked eye movements and recorded fixations.
  • Scan paths were analyzed using a grid overlay to quantify 'Boxes Viewed' and 'Concentration'.

Main Results:

  • Higher 'Concentration' correlated positively with faster 'Detection Speed' (R=0.84).
  • Higher 'Boxes Viewed' correlated negatively with 'Detection Speed' (R=-0.71).
  • Optimal scan paths, balancing 'Concentration' and 'Boxes Viewed', yielded the highest accuracy (p=0.02).

Conclusions:

  • An optimal scan path integrates both top-down and bottom-up processing for efficient change identification.
  • Scan path analysis can quantitatively assess cognitive processing and track improvements in neurological rehabilitation.