ERP evidence that surface-based attention biases interocular competition during rivalry

Area of Science:

• Neuroscience
• Cognitive Psychology
• Visual Perception

Background:

• Binocular rivalry occurs when dissimilar images are presented to each eye, leading to alternating perception.
• Previous research showed attention can bias perception towards a cued surface during rivalry.

Purpose of the Study:

• To investigate the neural mechanisms underlying attention's influence on binocular rivalry using event-related potentials (ERPs).
• To examine how attentional cueing affects visual processing when competing surfaces are viewed dichoptically versus monocularly.

Main Methods:

• Subjects performed a visual task involving superimposed transparent surfaces and successive translations.
• Attentional cueing was manipulated by the first translation, followed by dichoptic or monocular presentation of surfaces.
• Event-related potentials (ERPs) were recorded to analyze neural responses to visual stimuli.

Main Results:

• Attentional cueing enhanced perceptual bias for the cued surface, particularly during dichoptic viewing (rivalry).
• ERP analysis revealed significant differences in P1, N1, and P2 components between same-surface and different-surface comparisons.
• Larger cueing effects on ERP components were observed during rivalry compared to monocular viewing.

Conclusions:

• Attentional cueing initiates an earlier interocular selection process in binocular rivalry.
• Findings support a hybrid model of binocular rivalry, integrating early selection mechanisms.
• Neural evidence from ERPs clarifies the role of attention in resolving visual competition.