Psycholinguistics is the interdisciplinary study of the psychological and neurobiological factors involved in language. It has roots in education and philosophy and examines how the brain processes language from speech sounds to meaning. Psycholinguistics is divided into subfields that correspond to different components of language, such as phonology, morphology, syntax, semantics, and pragmatics. Rationalism holds that language is learned through logical reasoning abilities innate to humans. Cognitive approaches view language as part of broader human cognitive capacities and reject the behaviorist idea that language is learned through conditioning alone.