Human physiological responses to different types of human-dog interactions: A randomised crossover study

Area of Science:

• Human-Animal Interaction
• Psychophysiology
• Behavioral Science

Background:

• Previous human-dog interaction studies lack standardized interaction types, leading to inconsistent findings.
• Quantifying the intensity and nature of human-dog interactions is essential for comparability and understanding physiological responses.

Purpose of the Study:

• To investigate if different standardized types of human-dog interaction elicit distinct immediate physiological responses in healthy humans.
• To determine the influence of interaction intensity on physiological measurements during human-dog engagement.

Main Methods:

• Thirty-three healthy participants underwent four conditions: no dog (CONTROL), visual contact (VISUAL), petting (TACTILE), and active play (ACTIVE).
• Continuous monitoring of heart rate (HR), heart rate variability (HRV), and skin conductance (SCL, SCR).
• Measurements of blood pressure (BP) and salivary cortisol (s-cortisol) before and after each 10-minute interaction period.

Main Results:

• Heart rate, heart rate variability, blood pressure, and skin conductance all showed significant increases with greater interaction intensity (p < 0.001).
• Specific patterns emerged: HRV correlated with decreased HR, increased SCL, and SCR, varying by interaction type.
• Salivary cortisol levels increased with elevated HR (p = 0.042), and skin conductance measures showed interdependencies.

Conclusions:

• Physiological measurements like HR, HRV, BP, SCL, and SCR are demonstrably influenced by the type and intensity of human-dog interaction.
• Standardized quantification and reporting of interaction types are vital for the validity and reproducibility of human-dog interaction research.