highly significantp < 0.0001
Effects of Behavioral States and Pharmacological Interventions on Linear Heart Rate Measures Overall, highly significant differences were identified for HR (F 19,69.16 = 115.82; p < 0.0001) and SDNN values (F 19,68.74 = 44.04; p < 0.0001) between the experimental groups ( Figure 1 A,B).