Although the concept of privacy is not commonly associated with young children, the research of Schwartz (1968) and Wolfe and Laufer (1974) has pointed to the existence of developmental trends in the expression and comprehension of privacy. Schwartz maintains that infants express a desire for privacy by squirming and wriggling away from an adult. Wolfe and Laufer discovered that children of 4 to 5 years of age possessed a basic understanding of privacy but could not provide a verbal definition of the concept in the way older children could.