Language, as is known, is acquired under certain conditions: rapid and sequential brain maturation and cognitive development, the need to exchange information and to control others' actions, and an exposure to appropriate speech input. This research aims at analyzing preschoolers' overgeneralizations of the object labeling process in different categories in terms of age and gender. In this research, preschoolers' responses in overgeneralizations of the object labeling process of "clothes," "sports" and "ground vehicles" was found non-significant in respect of their gender, while preschoolers' responses in overgeneralizations of the object labeling process of "clothes," "sports" and "ground vehicles" was found significant in respect of their age.