The Effects of Hemianopia on Perception of Mutual Gaze
Autor: | Heiko Hecht, Alex R. Bowers, Sarah Sheldon |
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Rok vydání: | 2019 |
Předmět: |
Adult
Male media_common.quotation_subject Fixation Ocular Article Functional Laterality Neglect 03 medical and health sciences Nonverbal communication Ocular physiology 0302 clinical medicine Perception Humans Aged media_common Spatial bias Middle Aged Gaze Ophthalmology Eye position Space Perception Fixation (visual) Visual Perception 030221 ophthalmology & optometry Hemianopsia Female Visual Fields Psychology 030217 neurology & neurosurgery Optometry Cognitive psychology |
Zdroj: | Optom Vis Sci |
ISSN: | 1538-9235 1040-5488 |
Popis: | Significance Individuals with left hemianopic field loss (HFL), especially with neglect history, may have greater difficulties than individuals with right HFL in judging the direction of another person's gaze. Purpose Individuals with HFL often show a spatial bias in laboratory-based perceptual tasks. We investigated whether such biases also manifest in a more real-world task, perception of mutual gaze direction, an important, nonverbal communication cue in social interactions. Methods Participants adjusted the eye position of a life-size virtual head on a monitor at a 1-m distance until (1) the eyes appeared to be looking straight at them, or (2) the eyes were perceived to be no longer looking at them (to the right and left). Results Participants with right HFL (n = 8) demonstrated a rightward error in line bisection but made gaze judgments within the range of normally sighted controls (n = 17). Participants with left HFL without neglect history (n = 6) made leftward errors in line bisection and had more variable gaze judgments; three had estimates of gaze direction outside the reference range. Four participants with left HFL and neglect history made estimates of gaze direction that were to the right of the reference range. Conclusions Our results suggest that individuals with left HFL, especially with neglect history, may have greater difficulties than individuals with right HFL in compensating for low-level spatial biases (as manifested in line bisection) when performing the more complex, higher-level task of judging gaze direction. |
Databáze: | OpenAIRE |
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