Psycholinguistics is an interdisciplinary field that studies how people acquire, use, and process language in the brain. It draws from psychology, linguistics, cognitive psychology, and other fields. The document discusses key aspects of psycholinguistics including short and long term memory, encoding and retrieval, and linguistic theories related to phonology, morphology, syntax, and semantics. It also outlines three main aspects of human language: as a formal structured system, a biological faculty specific to humans, and as an abstract psychological reality linked to thought.