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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Definitions:

Appalachian

Pertaining to the cultural region in the Eastern United States that stretches from the Southern Tier of New York to northern Alabama, Mississippi, and Georgia.

Psychological Debriefing

A form of crisis intervention in which victims are helped to talk about their feelings and reactions to traumatic incidents. Also called critical incident stress debriefing.

Posttraumatic Stress

A mental health condition triggered by experiencing or witnessing a terrifying event, causing intense fear, helplessness, or horror.

Severity

The intensity or degree of seriousness of a condition or situation.