Bursty Rhythms: Exploring Daily Music Experiences in Infancy

Published on August 16, 2022

Imagine a series of short music clips, like little bursts of sound, that fill the day of an infant. Researchers decided to investigate the daily music encounters of infants aged 6-12 months using longform audio recordings. They found that these music episodes typically lasted less than a minute, with some longer ones sprinkled in. Interestingly, the timing of these episodes followed a bursty rhythm, rather than a predictable or random pattern. This pattern adds to a growing body of knowledge about how everyday sensory experiences shape infant development. By understanding the detailed parameters of infants’ everyday lives, researchers can now create theories that explain how babies acquire knowledge across multiple episodes. This research shows us that even in the early stages of life, everyday experiences play a crucial role in shaping our understanding of the world.

Abstract
Experience-dependent change pervades early human development. Though trajectories of developmental change have been well charted in many domains, the episode-to-episode schedules of experiences on which they are hypothesized to depend have not. Here, we took up this issue in a domain known to be governed in part by early experiences: music. Using a corpus of longform audio recordings, we parameterized the daily schedules of music encountered by 35 infants ages 6–12 months. We discovered that everyday music episodes, as well as the interstices between episodes, typically persisted less than a minute, with most daily schedules also including some very extended episodes and interstices. We also discovered that infants encountered music episodes in a bursty rhythm, rather than a periodic or random rhythm, over the day. These findings join a suite of recent discoveries from everyday vision, motor, and language that expand our imaginations beyond artificial learning schedules and enable theorists to model the history-dependence of developmental process in ways that respect everyday sensory histories. Future theories about how infants build knowledge across multiple episodes can now be parameterized using these insights from infants’ everyday lives.

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