Validation of the Keen Eye computer-based method for diagnosing visual neglect using a dual-task paradigm.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Clinical Neurology

Background:

• Visual neglect is a frequent and debilitating outcome of right hemisphere damage.
• Traditional assessments may miss subtle or compensated neglect, particularly with low attentional demands.

Purpose of the Study:

• To present and validate the Keen Eye computer-based method for diagnosing visual neglect.
• To improve diagnostic precision for subtle or hidden neglect profiles using an attention-demanding task.

Main Methods:

• A dual-task paradigm combining lateralized visual target detection and central digit identification.
• Testing 102 patients with right hemisphere damage using varied visual field target positions.
• Utilizing classification models based on error patterns and asymmetry coefficients.

Main Results:

• The Keen Eye method demonstrated high sensitivity and specificity in identifying visual neglect.
• The task revealed quadrant-specific and vertically biased omission patterns.
• The dual-task paradigm effectively increased attentional load to detect spatial biases.

Conclusions:

• Attention-demanding computer-based tasks enhance diagnostic accuracy for visual neglect.
• The Keen Eye method shows promise for identifying subclinical or hidden forms of neglect.
• This approach offers improved precision in diagnosing visual neglect in patients with right hemisphere damage.