Senior Project Advisor
Kelly J. Jantzen
Document Type
Project
Publication Date
Spring 2025
Keywords
ERP amplitude, Computer jitter, Visual ERP components, Visual Evoked Potential, Light-sensitive Diode, Stimulus onset, Time-locked
Abstract
Event-Related Potentials (ERP) are EEG responses that are time-locked to external stimuli and reflect underlying cognitive processing. For accurate recording of ERPs, it is necessary to include information about the stimulus. Modern computers introduce variability between the request to render an image to a monitor and when the image actually appears. This jitter may decrease the amplitude of the measured ERP components. Using a light-sensitive diode to detect stimulus onset, we determined how differences in onset timing impact latencies and amplitudes of select ERP components related to visual face processing. Results indicated that the majority of the component amplitudes are impacted with the exception of the EPN. This impact highlights the importance of using objective measures of stimulus onset when using visual stimuli for ERP experiments.
[A document with an explanation of the project poster is included as a supplementary file at the bottom of this page.]
Department
Behavioral Neuroscience
Recommended Citation
Cohan, Marin and Jantzen, Kelly J., "Addressing the Impact of Timing Jitter on Visual Evoked Potentials to Faces" (2025). WWU Honors College Senior Projects. 927.
https://cedar.wwu.edu/wwu_honors/927
Type
Text
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.
Language
English
Format
application/pdf