Psycholinguistics is the study of the cognitive and psychological processes underlying language acquisition, production, and comprehension. It investigates how the mind processes language and deals with the relationship between linguistic behavior and psychological mechanisms. Psycholinguistics has several sub-disciplines including theoretical psycholinguistics, developmental psycholinguistics, neuropsycholinguistics, and experimental psycholinguistics. It seeks to understand how language is acquired and produced by users as well as how the brain works in processing language.