Global Field Power

[Raymundo.Cassani]

Hi @SarahC, the computation of GFP was changed on September 2022 to match most common definition of GFP in the literature:

Global Field Power Calculation Difference

After checking the literature, the most standard definition of the GFP is the standard deviation across sensors: Global field power and topographic similarity | SpringerLink Glossary — MNE 1.2.dev0 documentation [Eeglablist] get global field power of ERP data Brainstorm was computing a RMS measure instead (sqrt(sum(x.^2)), and then normalizing by the maximum for display (brainstorm3/figure_timeseries.m at master · brainstorm-tools/brainstorm3 · GitHub). The results is usually very similar or …

Change was performed in Commit b9dce39f