Language acquisition is the process by which infants learn to understand and produce language.

Nativist theory emphasizes the role of innate knowledge in language learning, proposing that humans are born with a universal grammar that allows them to acquire any language.

A concept is a mental representation of the meaning of a word or phrase.

Parallel processing theory emphasizes the role of parallel processing in language comprehension, proposing that multiple aspects of a sentence are processed simultaneously.

The thought-language relationship refers to the relationship between language and thought, and the extent to which language influences or reflects thought.

Cognitive theory proposes that language is a tool for thought and that thought can occur without language.

Sociolinguistics is the study of the relationship between language and culture.

The Sapir-Whorf hypothesis proposes that language shapes the way people perceive and categorize the world.

Neurolinguistics is the study of the neural basis of language.

Broca's area is primarily responsible for language production.

Aphasia is the impairment of language comprehension and production due to brain damage.

Wernicke's aphasia is characterized by difficulty in understanding language.

Agraphia is the impairment of language production due to brain damage.

Anomic aphasia is characterized by difficulty in naming objects.

Apraxia is the impairment of speech production due to brain damage.