Object discrepancy modulates feature prediction across eye movements.

Area of Science:

• Cognitive psychology
• Neuroscience
• Visual perception

Background:

• Object perception during saccadic eye movements relies on integrating peripheral information with foveal predictions.
• These predictions are formed through transsaccadic associations between peripheral and foveal object details.
• Predictions may serve to mask resolution and location differences that occur across saccades.

Purpose of the Study:

• To investigate how discrepancies between peripheral and foveal objects impact predictive mechanisms in visual perception.
• To determine the extent to which learned transsaccadic associations influence object perception when shape changes occur during saccades.

Main Methods:

• Participants learned unfamiliar transsaccadic associations by viewing objects that changed shape during saccades.
• The magnitude of object shape change during saccades was systematically manipulated across participants.
• Peripheral shape perception judgments were assessed in a subsequent test phase to measure shifts toward foveal predictions.

Main Results:

• Judgment shifts in peripheral shape perception towards the predicted foveal input were dependent on the magnitude of the shape change experienced during learning.
• The influence of predictions on perception decreased as the size of the object discrepancy increased.
• Even with substantial shape changes (e.g., square to circle), predictions were not entirely disregarded, indicating a persistent contribution.

Conclusions:

• Object discrepancy during the learning phase significantly modulates the contribution of foveal predictions to peripheral perception.
• Learned predictions are robust and continue to influence perception even when faced with considerable visual discrepancies across saccades.
• These findings refine our understanding of how the visual system reconciles conflicting information during dynamic eye movements.