Table 2.

Correlation coefficient between CAEP and HRV before the phonological and semantic tasks.

Variable	Phonological		Semantic
	r	P	r	p
Lat N1
RMSSD	0.2744	0.228	0.1165	0.615
pNN50	0.2654	0.244	0.1801	0.180
HF (ms²)	0.1611	0.485	0.0384	0.868
SD1	0.2744	0.228	0.1165	0.615
Amp N1
RMSSD	−0.1228	0.596	−0.2416	0.291
pNN50	−0.0799	0.730	−0.1878	0.414
HF (ms²)	−0.2982	0.189	−0.2208	0.336
SD1	−0.1228	0.596	−0.2416	0.291
Lat P2
RMSSD	0.2830	0.213	0.3873	0.082
pNN50	0.2291	0.317	0.2985	0.188
HF (ms²)	0.2356	0.303	0.2606	0.254
SD1	0.2830	0.213	0.3873	0.082
Amp P2
RMSSD	0.1662	0.471	0.3519	0.117
pNN50	0.1332	0.565	0.4062	0.067
HF (ms²)	0.0175	0.939	0.3273	0.147
SD1	0.1662	0.471	0.3519	0.117
Lat N2
RMSSD	−0.0598	0.796	0.2976	0.190
pNN50	−0.1339	0.563	0.2234	0.330
HF (ms²)	−0.1423	0.538	0.2105	0.359
SD1	−0.0598	0.796	0.2976	0.190
Amp N2
RMSSD	0.0896	0.699	0.0571	0.805
pNN50	0.1403	0.544	0.0838	0.717
HF (ms²)	0.0429	0.853	−0.0260	0.911
SD1	0.0896	0.699	0.0571	0.805
Lat P3
RMSSD	−0.2263	0.323	0.2195	0.339
pNN50	−0.2895	0.203	0.2593	0.256
HF (ms²)	0.0403	0.862	0.1974	0.391
SD1	−0.2263	0.323	0.2195	0.339
Amp P3
RMSSD	0.2130	0.353	−0.1455	0.529
pNN50	0.2306	0.314	−0.0890	0.701
HF (ms²)	0.3072	0.175	0.0156	0.946
SD1	0.2130	0.353	−0.1455	0.529

Amp: amplitude; Lat: latency; RMSSD: root-mean square of differences between adjacent normal RR intervals in a time interval; pNN50: percentage of adjacent RR intervals with a difference of duration greater than 50 ms; HF: high frequency; ms: milliseconds; SD1: standard deviation of the instantaneous variability of the beat-to-beat heart rate.