Low voice pitch in orally delivered recommendations can increase compliance with hand sanitizer use among young adults

Abstract

Oral communications delivered in a low voice pitch are more persuasive and perceived as more pleasant and truthful than are communications delivered in a high pitch. The research reported in this article explored whether young adults’ compliance with an orally delivered recommendation to use hand sanitizer, an action thought to limit the spread of COVID-19 and other infectious diseases, would increase when the message was delivered in a low versus a high voice pitch. In an experiment involving 478 university students in Australia, a public health announcement delivered in a low voice pitch, compared with one delivered in a high voice pitch, increased participants’ sense of power, which increased their perceived behavioral control over their physical health and, in turn, increased their likelihood of using hand sanitizer. Because voice pitch is an aspect of health communications that can be modified easily at a low cost, the findings suggest a simple approach that public health and policy officials can adopt to improve hand hygiene in a population of people who spend a lot of time in close proximity and who should therefore practice hand hygiene routinely to protect themselves and others from infection.