Overview
- A paper published in The Journal of Neuroscience in early June reports that predictable stimuli make the brain prepare responses faster while encoding less fine sensory detail.
- Researchers tested 40 people with a controlled visual task and recorded EEG and pupil responses to compare expected and unexpected flashes.
- Both expected and unexpected flashes produced cortical signals within about 100 milliseconds, but unexpected flashes produced clearer EEG representations and better memory for exact location.
- Behaviorally, participants reacted faster and more accurately to expected flashes yet recalled their precise locations worse than after surprising flashes.
- The team plans follow-up work on how these mechanisms develop and how they might be used to make artificial neural networks more efficient, though the lab task and indirect measures limit how far the results can be generalized to complex real-world settings.