TABLE 2.
Correlations between the PNS HR/HRV measures and trait/performance measures.
| Pearson’s correlations | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Max-min HR | log LF | Log VLF | Total power | RMSSD | SD1 | SDNN | SD2 | Mean RR | Log HF | pNN50 | NN50 | |
| VF | N | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Pearson’s r | −.02 | .414 | .129 | .383 | .344 | .344 | .359 | .359 | .52* | .253 | .227 | .142 | |
| p-value | .933 | .07 | .588 | .096 | .138 | .138 | .12 | .12 | .019 | .281 | .335 | .55 | |
| NEO N | N | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Pearson’s r | −.416* | −.366 | −.26 | −.395* | −.453* | −.453* | −.406* | −.366 | −.259 | −.43* | −.481* | −.397* | |
| p-value | .028 | .056 | .182 | .037 | .016 | .016 | .032 | .055 | .184 | .023 | .01 | .036 | |
| ERQ Reappraisal | N | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Pearson’s r | −.251 | −.377 | −.046 | –.235 | −.231 | −.231 | −.272 | −.288 | .092 | −.24 | −.282 | −.248 | |
| p-value | .217 | .058 | .824 | .247 | .256 | .256 | .178 | .153 | .656 | .237 | .164 | .222 | |
| ERQ Suppression | N | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Pearson’s r | −.196 | −.113 | .039 | −.011 | −.047 | −.047 | −.046 | −.043 | .025 | −.188 | −.133 | −.077 | |
| p-value | .337 | .583 | .85 | .956 | .819 | .818 | .824 | .835 | .905 | .359 | .517 | .708 | |
| DRQ General | N | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Pearson’s r | −.4* | −.307 | −.144 | −.372* | −.302 | −.302 | −.324 | −.33 | −.067 | −.215 | −.243 | −.275 | |
| p-value | .031 | .106 | .455 | .047 | .112 | .112 | .086 | .08 | .73 | .263 | .204 | .148 | |
| DRQ Sociability | N | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Pearson’s r | −.266 | −.225 | −.121 | −.175 | −.123 | −.123 | −.175 | −.195 | .043 | −.068 | −.097 | −.122 | |
| p-value | .163 | .241 | .531 | .365 | .525 | .525 | .363 | .312 | .823 | .727 | .616 | .527 | |
| DRQ Distress | N | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Pearson’s r | −.597*** | −.584*** | −.49** | −.519** | −.517** | −.517** | −.558** | −.571** | −.25 | −.421 | −.389* | −.369* | |
| p-value | < .001 | < .001 | .007 | .004 | .004 | .004 | .002 | .001 | .19 | .023 | .037 | .049 | |
| DRQ StimSeeking | N | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Pearson’s r | .128 | .07 | −.027 | .035 | .096 | .096 | .094 | .091 | −.111 | .173 | .07 | .047 | |
| p-value | .509 | .72 | .889 | .855 | .622 | .622 | .629 | .637 | .568 | .369 | .719 | .81 | |
| Physical Fitness Test-Run | N | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Pearson’s r | .021 | .179 | .215 | .017 | −.098 | −.097 | .016 | .069 | .06 | −.142 | -.089 | –.098 | |
| p-value | .916 | .363 | .272 | .93 | .622 | .622 | .936 | .728 | .762 | .47 | .651 | .619 | |
| Expert Evaluation-ST | N | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Pearson’s r | −.054 | .136 | .216 | .13 | .098 | .097 | .168 | .202 | .068 | .061 | 7.724e –5 | −.041 | |
| p-value | .785 | .491 | .269 | .51 | .621 | .622 | .393 | .303 | .733 | .76 | 1 | .835 | |
| Peer Perception-ST | N | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Pearson’s r | −.287 | –.112 | −.018 | –.025 | .039 | .039 | .035 | .037 | .096 | .073 | .044 | −.017 | |
| p-value | .131 | .563 | .927 | .899 | .839 | .84 | .858 | .848 | .619 | .708 | .821 | .931 | |
* p < .05, ** p < .01, *** p < .001
VF, stress-induced change in verbal fluency; NEO N, NEO neuroticism; ERQ, emotion regulation questionnaire; DRQ, defensive reactivity questionnaire; ST, stress tolerance; Max-Min HR, heart rate range; LF, low frequency; VLF, Very-Low Frequency; RMSSD, root mean square of successive differences; SD1, Poincaré Perpendicular Standard Deviation; SDNN, Standard Deviation between R-R intervals; SD2, Poincaré Parallel Standard Deviation; RR, R to R interval in ECG, rhythm; HF, high frequency; pNN50, percentage of successive R-R intervals that deviate greater than 50 ms; NN50, number of R-R intervals that deviate greater than 50 ms.