noun plural but singular in construction\ˌsī-kō-liŋ-ˈgwis-tiks\(Medical Dictionary)
Medical Definition of PSYCHOLINGUISTICS
: the study of the mental faculties involved in the perception, production, and acquisition of language
Study of the mental processes involved in the comprehension, production, and acquisition of language. Much psycholinguistic work has been devoted to the learning of language by children and on speech processing and comprehension by both children and adults. Traditional areas of research include language production, language comprehension, language acquisition, language disorders, language and thought, and neurocognition. See alsolinguistics.