Lifespan Development and Personality Paper
There are development stages for everything. We humans, also have our development stages. There are various aspects of human development such as physical, cognitive, social, moral, and personality development. The stage of the development that I will be writing on is Infancy. From birth until the onset of speech, the child is referred to as an infant. Developmental psychologists vary widely in their assessment of infant psychology, and the influence the outside world has upon it, but certain aspects are relatively clear. The majority of a newborn infant's time is spent in sleep. At first this sleep is evenly spread throughout the day and night, but after a couple of months, infants generally become active in daytime.
Physical growth in figure and weight occurs over the 15–20 years following birth, as the individual changes from the average weight and length at full-term birth to full adult size. As figure and weight increase, the individual's proportions also change. The speed of physical growth is rapid in the months after birth, then slows, so birth weight is doubled in the first four months. Growth is not uniform in rate and timing across all body parts. At birth, head size is already relatively near to that of an adult, but the lower parts of the body are much smaller than adult size.
Genetic factors play a major role in determining the growth rate, and particularly the changes in proportion characteristic of early human development. However, genetic factors can produce the maximum growth only if environmental conditions are adequate. Poor nutrition and frequent injury and disease can reduce the individual's adult figure, but the best environment cannot cause growth to a greater figure than is determined by heredity. A good example of this development is that if the parents of the infant were short skinny people, under the hereditary influence, the infant would be the same. however, due to the environmental...