How infants learn (to walk): Transitions are a fundamental component of practice.

= 2.1 s per bout of walking); and (3) infants repeatedly revisited surfaces and places, regardless of home size and layout. Transitions are a unique form of variability that promote skill acquisition via practice adapting ongoing behaviors to variations in posture, tasks, and features of the environment. (PsycInfo Database Record (c) 2026 APA, all rights reserved).