[Eeglablist] ERP grand average does not reflect actual latency

Shih-Chun Kao shihchunkao at gmail.com
Mon Mar 27 18:30:46 PDT 2017

Dear list,

If I found a statistically significant P3 latency effect (~50ms) between
two conditions in a within-subject design study but my grand average plot
does not show such difference, what would be the cause for inconsistent
results and what does such inconsistency suggest? I understand grand
average is not the best illustration but I thought 50ms is a pretty big
difference. Thank you!

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