Abstract
This paper is a report that analyzes behavior development of infants who live at high-rise apartments. As the result of this report, the following points are confirmed. 1. Items of infants' behavior and cognition can be classified into three groups in terms of difficulty. "Independant behavior" of age 2-4 is explainable with the three groups of items. 2. Infants use stairs to go to another floor, if their destination has less than five floor differance in levels. If not, they usuallly use elevators. Differance in leveles an infant can go over by himself is, same floor at age 2, five floors at age 3, more than six floors at age 4. 3. Percentage of infants who can do "independant behavior" depends on housing project types, There are three types, type-A: a high-rise, high density type in an urban area, type-B: A large scale, low density type in a subarban area, type-C: a condominium type. With regard to percentage of "independant behavior" type-A is inferior to type-B. 4. Most infants who live in high rise and large scale housing projects haved ifficulty in going to another floor independently. And most infants who live on higher than the fifth floor have difficulty in going outdoors independently.
