No Evidence for Early Modulation of Visual Cortex Responses During the Attentional Blink
Author Information
Author(s): Jacoby Oscar, Visser Troy A. W., Hart Bianca C., Cunnington Ross, Mattingley Jason B.
Primary Institution: Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
Hypothesis
Do changes in V1 activity during the attentional blink arise from initial stimulus input or feedback from higher cortical areas?
Conclusion
The study found that early sensory processing of irrelevant probe stimuli is not suppressed during the attentional blink.
Supporting Evidence
- The amplitude of the C1 component was unaltered during the attentional blink.
- Participants' T2 accuracy was compromised when it was presented 200 ms after T1.
- Findings support the idea that the attentional blink arises from post-perceptual processing.
Takeaway
When we try to pay attention to two things quickly one after the other, our brain doesn't ignore the first thing we saw, even if we miss the second one.
Methodology
EEG signals were recorded while participants monitored a stream of letters for two target digits, measuring neural responses to an irrelevant probe stimulus.
Limitations
The study's findings may not generalize to all types of stimuli or tasks, as it focused on alphanumeric characters.
Participant Demographics
27 adult volunteers (13 male, 14 female, aged 19 – 27 years) with normal or corrected-to-normal vision.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website