SIGMATISM By N., Sam M.S. - 75 1. A lisp that involves incorrect sound production. 2. An obsolete name for lisping. SIGMATISM: "Sigmatism is no longer used for a person who lisps." Related Psychology Terms LISP 1 AUDITORY SPACE PERCEPTIO HEARING (AUDITION) SPEECH DISORDERS HEARING REACTION TIME (Response Latency) LANGUAGE (Psycholinguistics) REINFORCEMENT (Reward and Punishment) ASSISTIVE LISTENING DEVICE MUSIC AND WORK Cite this page: N., Sam M.S., "SIGMATISM," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/sigmatism/ (accessed February 6, 2023).