There are limitations and potential drawbacks in our
study. First, the study included a relatively small number
of participants, which likely limited its power. However,
power is a function of both the N and effect size. Although
our N was small, the effect sizes found on objective
measures were in the medium to large range. This
indicates that power was not a major limitation in our
study, at least with regard to those measures. Group assignment
was not randomized, but consecutive, and participants
with MCI who were in the no-intervention condition
were somewhat more affected than those who received
the intervention.