'Compute standard error over epochs.
Parameters
picks : array-like of int | None
If None only MEG, EEG, SEEG, ECoG, and fNIRS channels are kept
otherwise the channels indices in picks are kept.
Returns
evoked : instance of Evoked
The standard error over epochs.'

def standard_error(self, picks=None):

    return self._compute_mean_or_stderr(picks, 'stderr')
