The article was basically about how experiences, emotional development and wariness of heights are related. At a very early age, the child starts experiencing such as crawling. And this crawling leads to another experience for an infant. Infants development of height fear differs from adult acrophobia. Changes occur abruptly in fearfulness between the ages of six months to ten months. Gottlieb's "bootstrapping" approach stresses that possibly, under certain circumstances, psychological functions precedes the development of neuropsychological structures.

The first experiment that took place ninety-two infants at the age of seven and three hundredths months were tested. They took the babies and lowered them to each side of a cliff where visual placing responses were recorded. As predicted the locomotive infants showed a wariness of heights but the pre-locomotive infants did not show wariness of heights. Every infant tested showed visual placing responses to the shallow side of the...