Which statement best describes entrainment in infant development?

Which statement best describes entrainment in infant development?

• A. The infant remains still even when the parent speaks.
• B. The infant cries when the parent speaks.
• C. The infant follows parent's gaze.
• D. The infant moves in time to the rhythm of the parent's speech.

Answer: (D)

Entrainment is the infant’s ability to align their movements with an external rhythm. In infancy, a caregiver’s speech has a natural rhythm, and babies often move in time with that cadence—rocking, bouncing, or nodding along to the pace of the talk. This rhythmic synchronization supports social interaction and early language learning by creating predictable timing for turn-taking and joint engagement. The other described behaviors describe different processes: remaining still doesn’t show rhythmic coordination, crying in response to speech reflects emotion or communication, and following a caregiver’s gaze is about attention rather than rhythm. The statement about moving in time to the rhythm of the parent’s speech best captures entrainment.