FRHD 1020 Chapter Notes - Chapter 4: Emotional Contagion, Dishabituation, Longitudinal Study

• School: University of Guelph
• Department: Family Relations and Human Development
• Course: FRHD 1020
• Professor: Susan Chuang

Document Summary

Babies grow at a faster rate in their first year than at any later time of life. Birth weight doubles by the time the infant is 5 months old, and triples by the end of the first year, to about 10 kilos on average. At 6 months, a well-nourished baby looks on the plump side, but by year 1, the child lose much of their baby fat, and the trend toward a lower ratio of fat to body weight continues until puberty. Growth in height in the first year is uneven, occurring in spurts rather than steadily. Cephalocaudal principle: principle of biological development that growth tends to begin at the top, with the head, and then proceeds downward to the rest of the body. Proximodistal principle: principle of biological development that growth proceeds from the middle of the body outward. Teething: period of discomfort and pain experienced by infants as their new teeth break through their gums.