This case report describes the effect of temporary sensory deprivation (hearing loss during the first three years of life) on the psychological functioning of a seven-year-old child. The effect of such temporary hearing loss on thought organization, delay capacity, and interpersonal relationships is described, and the substitution by the child of motoric, nonverbal modes of communication for speech is demonstrated. Eisen also summarizes much of the relevant literature on the reversibility and irreversibility of certain effects produced by early sensory deprivation.