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. 2018 Jul 6;13(7):e0200306. doi: 10.1371/journal.pone.0200306

Table 2. Behavioral and physiological measures.

Measure Value P Value
Measure UVL VRL VRH UVL|VRL VRL|VRH
Heart Rate Variability (beats/min) 6.6 (1.5) 7.0 (1.6) 8.3 (2.4) 1.00 0.02*
Heart Rate Frequency Power (%) 45.6 (12.5) 51.8 (15.2) 58.9 (14.0) 0.11 <0.01*
Electrodermal Activity (counts/min) 8.2 (11.7) 15.1 (14.7) 13.7 (11.0) <0.01* 0.74
Failures per Minute (counts/min) 7.1 (2.5) 26.1 (4.9) 24.8 (5.6) <0.01* 1.00
Heart Rate (beats/min) 92.0 (7.9) 97.0 (8.7) 97.1 (10.6) <0.01* 1.00
Response Time (s) 0.76 (0.25) 0.88 (0.25) 0.94 (0.27) 0.02* 0.10
Number of Beam Passes 43.0 (15.7) 26.6 (9.4) 24.7 (7.6) <0.01* 0.38
Estimated Gait Speed (m/s) 0.18 (0.07) 0.13 (0.04) 0.13 (0.04) 0.03* 1.00

Mean behavioral and physiological measures are shown for unaltered view low (UVL), virtual reality low (VRL) and virtual reality high (VRH), with standard deviation in parentheses (n = 19 for each condition). The first 3 measures assessed stress induction. The other measures assessed cognitive and physical performance. All measures shown had significant Friedman test results across conditions. Pairwise comparison p-values are shown:

* denotes significant differences (p<0.05).

We only made two comparisons: 1) unaltered view low vs. virtual reality low and 2) virtual reality low vs. virtual reality high.