ERP Evidence of Visualization at Early Visual Processing Stages
Cognitive neuroscience; visual imagery; electrophysiological measurement and modeling
Citation
Page, J. W., Duhamel, P., & Crognale, M. A. (2011). ERP evidence of visualization at early stages of visual processing. Brain and Cognition, 75(2), 141–146.
Project context
This study asked whether early visual cortical processing during mental imagery resembles processing during direct visual perception.
Participants viewed visual patterns and later visualized the same stimuli, enabling direct comparison of time-locked electrophysiological responses.
PerceptMX technology role
PerceptMX methodologies supported structured stimulus presentation, ERP acquisition, waveform alignment, and quantitative similarity analysis.
Cross-correlation procedures enabled objective comparison of perceptual and imagery ERP waveforms under matched stimulus classes.
Methodological contribution
The design included perception, control, and visualization phases. ERPs were recorded with standardized filtering and artifact screening, then averaged within condition.
Waveform similarity was quantified using correlation-based measures after temporal alignment within a constrained sliding window.
Outcome or impact
ERP waveforms during imagery closely resembled those during perception for matching stimulus types and differed across stimulus classes, consistent with shared early-stage visual processing involvement.
Results supported functional similarity between seeing and imagining for early visual cortical responses, with predictable attenuation and timing differences.