Onset of Locomotion: Beginning of locomotion (self-initiation of movement) is thought to be related development of range of skills in or domains, e.g., perception of distance, wariness of h8s, spatial search strategies, receiving social signals, proximity seeking for attachment
Locomotion & joint attention: Campos et al. 1997 (see Campos et al. 2000). 8.5 month–olds, 22 per group. “Look over re” + pointing to toy. DV = where infant looked. As y progress in learning to walk over time looking toward correct target area pointed out by exp increases.
Locomotion: cross-cultural: Tao & Dong 1997, doctoral sis (see Campos et al. 2000): Infants in urban China: onset of locomotion approx. 3mo later than Western norms (Bayley, 1969). Traditional practice: kept swaddled on a bed, thick warm clothing, crawling discouraged for cleanliness. Expt 1: 90 Chinese infants, 8-11 months - Crawlers (5+ weeks) took significantly fewer trials to look to correct direction than prelocomotors & ≤ 3 week experienced crawlers. Effect of crawling experience still sigafter controlling for age. Expt 2: Limited locomotor experience vs. allowed to crawl on floor of flat (equivalent ages) Floor crawlers turned to correct direction on significantly more trials than infants w/ limited locomotor experience.