highly significantP -values <.0001
For lnRMSSD, the self-paced cognitive task was not significantly different from the recovery resting (i2−i4: P = .87, d = .16) but it was from the final resting (i4−i5: P < .01, d = .23). The level of the task under time pressure (i3) was between those of the teaching interval and the others, with highly significant differences ( P -values <.0001, d = .29 to .52) from all of them.