Active vision is linked to category selectivity in the individual brain

Area of Science:

• Neuroscience
• Cognitive Psychology
• Visual Perception

Background:

• Individuals exhibit significant variations in visual attention patterns, particularly in fixating on faces and text within complex scenes.
• Understanding the neural basis of these individual differences in gaze behavior is crucial for comprehending visual processing.

Purpose of the Study:

• To investigate the hypothesis that individual differences in gaze tendencies are associated with specific representational properties of the visual system.
• To explore the link between visual fixation patterns and the neural encoding of categories like faces and text.

Main Methods:

• Utilized eye-tracking to record naturalistic scene viewing gaze tendencies in 61 adults.
• Employed functional magnetic resonance imaging (fMRI) to measure category-selective brain responses (faces, words) during central fixation tasks.

Main Results:

• A higher propensity to fixate faces or text correlated with enhanced distinctiveness and larger functional brain regions for these categories in the ventral stream.
• These neural distinctiveness and resource metrics predicted individual performance on reading and face recognition tasks.

Conclusions:

• Active vision, or how individuals scan their environment, is intrinsically linked to the precision of category-selective neural encoding.
• The extent and distinctiveness of neural resources in the visual system underpin individual differences in visual attention and task performance.