. Author manuscript; available in PMC: 2016 Oct 1.

Published in final edited form as: Int J Psychophysiol. 2015 Jul 10;98(1):76–86. doi: 10.1016/j.ijpsycho.2015.07.003

Table 2.

Main Variables’ Descriptive Statistics and Simple Bivariate Correlations

	Mean (SD)	2	3	4	5	6
1. HF-HRV^†	309 (815)	−.031	.021	.064	.053	.108^*
2. STAI^†	32.7 (8.55)	—	.727^**	−.105^*	−.041	−.033
3. CESD^†	7.23 (7.12)		—	−.067	−.042	−.046
4. Category Fluency	20.44 (5.82)			—	.143^**	.281^**
5. Digits Backward	5.18 (1.42)				—	.159^**
6. Red/Green	1.03 (.201)					—

p < 0.05;

^**

p <0.01.

Note: All descriptive statistics reflect raw data.

^†

For the three non-normally distributed variables, bivariate correlations reflect the log-transformed data used in the analyses. CESD = Center for Epidemiologic Studies Depression Scale; HF-HRV = high-frequency heart rate variability (0.15–0.50 Hz, msec²); STAI = Spielberger Trait Anxiety Inventory–Trait scale.