Temporal recalibration to delayed visual consequences of saccades

Area of Science:

• Neuroscience
• Cognitive Science
• Visual Perception

Background:

• Accurate causality inference relies on precise temporal relationships between actions and sensory outcomes.
• Temporal recalibration, the perceptual adjustment to delayed sensory feedback, is known in various sensorimotor domains.
• Its extension to saccadic eye movements and contingent sensory events remains largely unexplored.

Purpose of the Study:

• To investigate if temporal recalibration mechanisms apply to saccadic eye movements and their associated sensory events.
• To determine how the visual system adapts to temporal delays between eye movements and visual consequences.

Main Methods:

• Participants performed horizontal saccades triggering flashes with variable delays.
• Perceptual reports on flash timing relative to saccade offset were collected.
• Recalibration effects were assessed under varied visual cues and in a saccade replay condition.

Main Results:

• Exposure to consistent saccade-flash delays shifted perception, with delayed flashes often perceived as occurring during the saccade.
• This recalibration was robust to changes in visual context (background, target continuity).
• Saccade execution was crucial, as a replay condition showed a significantly smaller recalibration effect.

Conclusions:

• The visual system demonstrates significant adaptability in recalibrating perceived timing between eye movements and sensory feedback.
• This visuomotor temporal recalibration mechanism likely contributes to perceptual stability in natural vision.
• Dynamic realignment of saccades with visual input aids stable perception amidst temporal variability.