Unit:
Specialty Cognitive NeuroscienceLibrary of the School of Health Sciences
Author:
Saprikis Orionas-Vasilis
Supervisors info:
Νικόλαος Σμυρνής, Καθηγητής, Ιατρική, ΕΚΠΑ, Επιβλέπων
Ιωάννης Ζαλώνης, Αναπληρωτής Καθηγητής, Ιατρική, ΕΚΠΑ
Σωκράτης Παπαγεωργίου, Αναπληρωτής Καθηγητής, Ιατρική, ΕΚΠΑ
Original Title:
Systematic Directional Error in Peripheral Vision
Translated title:
Systematic Directional Error in Peripheral Vision
Summary:
This study investigated the pattern of systematic directional error (DE) in peripheral vision This pattern manifests as a perceived expansion of space in the vicinity of cardinal directions (0°/90°/180°/270°) and a contraction of space in the vicinity of diagonal directions (45°/135°/225°/315°). Alongside this pattern, the phenomenon of radial bias was also investigated. A total of 20 subjects were asked to fixate their gaze and then to align an arrow to a target using only their peripheral vision. The arrow and the target would appear in 4 different peripheral locations in comparison to the center of fixation (at an angle of 0°, 22.5°, 157.5°, or 180°). The mean difference between the subjects’ answers and the target’s actual direction was used to demonstrate the existence of the systematic DE, which was similar in pattern but differed in magnitude between cardinal peripheral locations and the oblique peripheral locations. No evidence of a radial bias was found.
Main subject category:
Health Sciences
Keywords:
Systematic directional error, Mean directional error, Oblique effect, Radial bias, Space categorization, Space representation
