[FieldTrip] cluster-level statistic effect size

Mark Noordenbos mark.noordenbos at gmail.com
Fri Apr 26 15:58:40 CEST 2013

Dear Fieldtrippers,

When computing cluster-level statistics recent versions of Fieldtrip now
also compute the SD and confidence interval of the estimated p-value for
each cluster. But I was wondering if it is also possible to compute an
effect size such as Cohen’s d of the observed effect. Normally, 2*t-value
divided by sqrt(df) gives Cohen’s d. However, this does not work for the
summed t-values in each cluster.

Any suggestion how to compute an effect size for the cluster-level


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