Hide and seek: Directing top-down attention is not sufficient for accelerating conscious access

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Psychology

Background:

• Conscious visual experience is limited, with visual input competing for access.
• Top-down attention, the flexible allocation of processing resources, is a potential mechanism for biasing conscious access.
• Understanding attentional control over consciousness is crucial for cognitive science.

Purpose of the Study:

• To investigate if top-down attention to specific locations or features accelerates conscious access of suppressed visual stimuli.
• To determine the role of attentional template specificity in modulating conscious access.
• To explore the volitional control humans have over their visual awareness.

Main Methods:

• Participants performed speeded discrimination tasks with cued spatial locations or colors.
• Interocular suppression was used to present visual probes.
• Detection times for suppressed probes, varying in location and feature, were measured under different attentional conditions.

Main Results:

• Directing attention to a specific location or color did not speed the conscious access of suppressed probes.
• Sustained attention was confirmed by faster discrimination of cued over uncued targets.
• Conscious access of suppressed probes was faster when attention was directed to a broader feature (color) within a less defined search task.

Conclusions:

• Specific attentional templates (location, color) do not enhance conscious access of suppressed stimuli.
• The specificity of attentional templates significantly impacts the ability to bias conscious visual awareness.
• Top-down attentional biases on conscious access are constrained by the precision of attentional templates.