Now listen to this! Evidence from a cross-spliced experimental design contrasting pressuring and supportive communications

Abstract

Motivating communications are a frequent experience within daily life. Recently, it has been found that two types of motivations are spoken with distinct tones of voices: control (pressure) is spoken with a low pitched, loud tone of voice, fast speech rate, and harsh sounding voice quality; autonomy (support) is spoken with a higher pitched, quieter tone of voice and a slower speech rate. These two motivational tones of voice also differentially impact listeners' well-being. Yet, little is known about the brain mechanisms linked to motivational communications. Here, participants were asked to listen to semantically identical sentences spoken in controlling, neutral, or autonomy-supportive prosody. We also presented cross-spliced versions of these sentences for maximum control over information presentation across time. Findings showed listeners quickly detected whether a speaker was providing support, being pressuring, or not using motivating tones at all. Also, listeners who are pressured do not seem to respond anew when a supportive motivational context arises, but those who had been supported are affected by a newly pressuring environment. Findings are discussed in light of motivational and prosody literatures, and in terms of significance for the role of motivational communications on behavior.