This thesis examined the basic developmental concepts , space, quantity, time, miscellaneous, as they related to family size, sex, and rural-urban environment among kindergarten children. The Boehm Test of Basic Concepts was individually administered to 53 students from two kindergarten classes--one from Ogden City School District and one from Cache County School District. The findings indicated that family size, sex of the child, or urban-rural environment produced no significant differences in concept development among kindergarten children.