Statement of the Problem: The purpose of this study was to obtain information regarding the prevalence of thumb-sucking behavior, assess typical situations in which the behavior occurs, identify what the child is feeling when the behavior occurs, and explore the purpose of the behavior.
Fohn, S. M.
(1998). A descriptive study of the thumb/finger-sucking behavior of female and male subjects three years and older.
International Journal of Orofacial Myology,