The experiment was completed by 109 students, with no significant
group (relaxation vs. active vs. placebo) differences
in baseline or demographic measures, with the exception
of a significant group difference in age, F(2, 108) = 3.73,
p = 0.027, partial 2 = 0.07 (see Table 1). Post hoc tests found
the placebo group to be significantly older than the active
group (p = 0.043), but as the difference was less than 1 year,
it is unlikely that this age difference is relevant. Due to compatibility
issues related to hardware/software interfacing
and upgrades, data were available for fewer participants for
SCR and HRV than other measures. However, demographic
group comparisons remained the same regardless of group
size. Sample size for each measure is 109 unless otherwise
noted