Early effects of previous experience on conscious perception.
Jaan Aru, Renate Rutiku, Michael Wibral, Wolf Singer, Lucia Melloni
Neuroscience of Consciousness 2016 DOI: 10.1093/nc/niw004 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Experimental study Peer reviewed |
|---|---|
| Keywords | Meg Contents of consciousness Predictive coding Prior knowledge |
| Key findings | Prior knowledge took effect in the time-window 80-95 ms after stimulus onset, reflecting an early influence on conscious perception, with sources in occipital and posterior parietal regions. |
Abstract
Constructive theories of brain function such as predictive coding posit that prior knowledge affects our experience of the world quickly and directly. However, it is yet unknown how swiftly prior knowledge impacts the neural processes giving rise to conscious experience. Here we used an experimental paradigm where prior knowledge augmented perception and measured the timing of this effect with magnetoencephalography (MEG). By correlating the perceptual benefits of prior knowledge with the MEG activity, we found that prior knowledge took effect in the time-window 80-95 ms after stimulus onset, thus reflecting an early influence on conscious perception. The sources of this effect were localized to occipital and posterior parietal regions. These results are in line with the predictive coding framework.