Assistive Visual Cues for Visual Neglect Patients

2026-06-24

AI Summary

This study addresses the profound difficulties faced by patients with visual neglect in attending to contralesional space, which severely impairs daily functioning. It presents the first systematic comparison of endogenous (top-down) and exogenous (bottom-up) visual cues in guiding attention in such patients, while also investigating the potential synergistic benefits of combining both cue types. Using human-computer interaction experiments incorporating eye-tracking or pointing tasks, the study quantifies target acquisition time and accuracy. Results demonstrate that within the neglected hemifield, endogenous cues yield a mean response time of 3.5 seconds—significantly faster than the 6.5 seconds observed with exogenous cues. Combining both cue types further reduces response time to 2.8 seconds, although substantial interindividual variability is evident. These findings offer empirical support and novel directions for personalized rehabilitation strategies.

Abstract

Previous research on exogenous and endogenous cues has shown how they direct attention and improve interaction speed and error rate in applications. However, most studies focus on people with normal sight. People suffering from visual neglect have difficulties attending to parts of the visual field. One treatment method calls for the use of strong visual cues to remind patients of their neglected area and help guide their attention to it. Therefore, we examine the effects of endogenous and exogenous cues on visual neglect patients. Our results showed that visual neglect patients perform better with endogenous cues, when targets are within their neglected area. In some cases, combining exogenous and endogenous cues improve performance further. However, the performance varies greatly between patients. Using one neglect patient as an example, we saw that the best endogenous cue had an average acquisition time of 3.5 seconds compared to 6.5 for the best exogenous. Combining exogenous and endogenous cues further improved acquisition time to 2.8 seconds.

Problem

• visual neglect
• visual cues
• endogenous cues
• exogenous cues
• attention guidance

Innovation

• visual neglect
• endogenous cues
• exogenous cues
• assistive visual cues
• attention guidance