The behavioural preview effect with faces is susceptible to statistical regularities: Evidence for predictive...

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Psychology

Background:

• Visual perception maintains stability during saccadic eye movements.
• Trans-saccadic perception explains the preview effect, where performance is better for unchanged stimuli.
• This perceptual mechanism is known to adapt to environmental statistics.

Purpose of the Study:

• To investigate if the behavioral preview effect adapts to environmental statistics.
• To determine if training with specific saccadic trial types influences the preview effect.
• To explore the predictive nature of trans-saccadic adaptation.

Main Methods:

• A between-participants training design was employed.
• Participants performed saccades to faces that could change orientation during the saccade.
• Training involved exclusive exposure to either valid or invalid saccadic trials, followed by a mixed test phase measuring the preview effect.

Main Results:

• Invalid saccadic trial training significantly reduced the behavioral preview effect.
• A mixed-model analysis revealed a gradual decline in the training effect over the test phase.
• The findings indicate that the preview effect is not static but adaptable.

Conclusions:

• The behavioral preview effect demonstrates adaptive characteristics, mirroring trans-saccadic perception's response to environmental statistics.
• This adaptation suggests that the preview effect arises from predictive processing mechanisms.
• The study provides evidence for the brain's ability to dynamically adjust visual processing based on recent experience.