Table 1.

Means, Standard Deviation, and Effect Sizes for Key Study Variables

Variables	Full Sample Means (SD)	Dog Condition Mean (SD)	No Dog Condition Means (SD)	Effect sizes (d s)
Positive Affect
Baseline	3.07 (.98)	3.31 (.97)	2.84 (.94)	.49
Speech Preparation Task	2.66 (1.17)	2.93 (1.24)	2.41 (1.05)	.45
Post-Speech	2.49 (1.09)	2.70 (1.07)	2.28 (1.09)	.39
Recovery	2.79 (1.13)	2.99 (1.18)	2.60 (1.05)	.35
Negative Affect
Baseline	1.13 (.18)	1.10 (.15)	1.15 (.21)	.27
Speech Preparation Task	1.29 (.34)	1.30 (.38)	1.29 (.30)	.03
Post-Speech	1.45 (.51)	1.48 (.62)	1.42 (.38)	.12
Recovery	1.15 (.29)	1.17 (.37)	1.13 (.18)	.14
HF-HRV
Baseline	1360.38 (1180.19)	1306.38 (1059.74)	1413.22 (1296.85)	.09
Speech Preparation Task	841.41 (863.26)	860.80 (923.59)	822.46 (809.71)	.04
Post-Speech	855.25 (973.11)	908.34 (1126.63)	803.33 (804.90)	.11
Recovery	1201.78 (1292.54)	1288.83 (1504.13)	1122.30 (1074.77)	.13

Note: Ns for Positive Affect ranged from 91 to 92 for the total sample, 44 to 45 for the dog condition, and 47 for the no dog condition; for Negative Affect, 91 to 92 for the total sample, 44 to 45 for the dog condition, and 47 for the no dog condition; and for HF-HRV, 88 to 91 for the total sample, 42 to 45 for the dog condition, and 45 to 46 for the no dog condition. Scores for positive affect and negative affect could range between 1.0 and 5.0.