Parapraxis is a technical term for what is usually called a Freudian slip. Freud believed that these mistakes were significant. That is, they almost always betray powerful but unconscious motives.
Linguistics
Linguistics is the scientific study of language. It encompasses the analysis of every aspect of language, as well as the methods for studying and modeling them. The traditional areas of linguistic analysis include phonetics, phonology, morphology, syntax, semantics,...