Late Positivity Correlates with Subjective Reports: Evidence from the Low-frequency and High-frequency Reporting Tasks.
Neuroscience May 14, 2024 Muwang Ye, Anhui Wang, Haiyang Liang et al. 3 citations
Late positivity (LP) in EEG recordings, often considered a neural correlate of consciousness, may instead reflect post-perceptual processing tied to subjective reports. In an experiment, participants completed two reporting tasks: one requiring reports on 25% of trials (low-frequency) and another requiring reports on every trial (high-frequency). Hit rates were lower and false alarm rates higher in the low-frequency task. Visual awareness negativity (VAN) was larger on reporting trials in the low-frequency task, while LP was larger on reporting trials in the high-frequency task. These results indicate that LP amplitude increases with greater task relevance and frequency of subjective reports, suggesting LP correlates with subjective reporting rather than consciousness itself.