Family size is defined in terms of the number of children in the household. The family is profoundly important to the developmental, emotional and cognitive growth of a child. Personality is defined as the characteristic set of behaviors, cognitions, and emotional patterns that evolve from biological and environmental factors. A pair of 200 twins in the age group of 3-6 years from five cultural zones of state Haryana was taken. Two variables were taken for the study. Family size was taken as independent variable and personality was taken as dependent variable. | The role of family size in personality development of twins in five cultural zones of Haryana India
