Why Does an EEG Signal Need to Be Averaged Over

question 17

Multiple Choice

Why does an EEG signal need to be averaged over many trials to generate an ERP?

• A) EEG has a poor spatial resolution.
• B) EEG has a low signal:noise ratio.
• C) The scalp potentials from a single EEG trial are too weak to measure.
• D) To ensure that the ERP is reliable over time

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