Fig. 1. Scatterplot of baseline to task increases in NKCA (% lysis) vs. HR reactivity (beats/min). The line is plotted by linear regression (r = 0.40, p < .005).
Fig. 2. Scatterplot of baseline cortisol levels (ng/ml) vs. HR reactivity (beats/min). The line is plotted by linear regression (partial correlation = 0.29, p < .04).