Table 2. Results of mANCOVAs and follow-up simple effects analyses for the changes in heart rate and HRV in Time-on-Task.
| Variables | Analysis | |||||||
|---|---|---|---|---|---|---|---|---|
| mANCOVAs | Simple effects analyses | |||||||
| Block effect | Block x Group | Block effect (Gatekeeper task group) | Block effect (Documentary-viewing group) | |||||
| F(4,152) | ηp2 | F(4,152) | ηp2 | F(4,35) | ηp2 | F(4,35) | ηp2 | |
| HR | 4.75** | .11 | 16.83*** | .31 | 25.92*** | .75 | 2.04 | .19 |
| RMSSD | 4.01* | .10 | 3.57* | .09 | 8.96*** | .51 | 1.69 | .16 |
| lnRMSSD | 10.75*** | .22 | 6.34** | .14 | 13.16*** | .60 | 2.52m | .22 |
| pNN50 | 6.61** | .15 | 3.56* | .09 | 6.70*** | .43 | 1.52 | .15 |
| HF | 2.572m | .06 | 2.97* | .07 | 4.20** | .32 | .45 | .05 |
| lnHF | 11.09*** | .23 | 5.35** | .12 | 11.14*** | .56 | 2.72* | .24 |
| LF | 12.14*** | .24 | 2.89* | .07 | 6.97*** | .44 | 4.98** | .36 |
| lnLF | 5.61** | .13 | 3.75* | .09 | 20.92*** | .71 | 6.85*** | .44 |
| SD2 | 9.81*** | .21 | 5.09** | .12 | 15.04*** | .63 | 6.96*** | .44 |
Note. mANCOVA: Block as a within-subject, Group as a between-subject factor and pre-experiment resting HRV as a covariate; Block: five 15-minute-long intervals (selected in each block) in the Time-on-Task period. Group: group of participants in the Gatekeeper task group and in the Documentary-viewing group
*p < .05
**p < .01
***p < .001, m: p = .05 –.06.