Miller, Patterson, and Ulrich (1998) introduced a jackknife-based
method for measuring the differences between two conditions
in the onset latencies of the lateralized readiness potential
(LRP). The present paper generalizes such jackknife-based methods
to factorial experiments with any combination of within- and
between subjects factors. Specifically, we introduce a subsample
scoring method to assess potential main and interaction effects
on LRP onsets within conventional yet slightly adjusted analyses
of variance (ANOVAs) and post hoc comparison procedures.
