Micro-variations in timing and loudness affect music-evoked mental imagery

Area of Science:

• Cognitive Psychology
• Auditory Neuroscience
• Music Cognition

Background:

• Music influences directed mental imagery (vividness, sentiment, content).
• Specific musical features driving these effects are not well understood.
• Micro-variations (deviations in timbre, pitch, timing) enhance perceived naturalness in music.

Purpose of the Study:

• To investigate if random micro-variation in drumming affects mental imagery characteristics.
• To compare the effects of drumming with micro-variation, without micro-variation, and silence on mental imagery.

Main Methods:

• One hundred participants engaged in a directed mental imagery task (imagining a journey).
• Auditory conditions included drumming with micro-variation, drumming without micro-variation, and silence.
• Participants rated imagery vividness, distance, and time traveled; free-form content was also collected.
• Bayesian multilevel regression models were used for analysis.

Main Results:

• Repetitive drumming, especially with random micro-variation, enhanced mental imagery vividness.
• Drumming with micro-variation increased imagined distance and time traveled compared to silence.
• Individual traits (absorption, imagery ability, musical training) interacted with auditory conditions.

Conclusions:

• Random micro-variations in auditory stimuli can significantly enhance directed mental imagery.
• These findings suggest music's potential to support imagery in creative and therapeutic contexts.
• Individual differences play a crucial role in modulating the impact of auditory stimuli on mental imagery.