PSYCH211 Study Guide - Quiz Guide: Cohort Study, 18 Months, Mirror Test
19 Nov 2016
School
Department
Course
Professor
Document Summary
Chapter 05: physical deveopment in infancy and toddlerhood. By the end of the first year, a typical infant"s height is about 32 inches (50% > than birth) By 2 years, it is 75% greater (36 inches) By 5 months of age, birth weight has doubled to about 15 pounds, by 1 year it has tripled, by 2 years it has quadrupled. One study: from 7-63 days there was no growth, then half an inch in 24 hours. Early rise in baby fat peaks at about 9 months helps maintain a constant body temperature. Muscle tissue increases very slowly during infancy and will not reach a peak until adolescence. Infancy girls are shorter and lighter than boys, with a higher ratio of fat to muscle. In the second year, toddlers slim down, a trend that continues into middle childhood. Parts of the body grow at different rates.
