1) The document discusses various topics related to language processing and cognition, including speech perception, word and sentence comprehension, reading, and discourse.
2) Key aspects of language covered include its properties, basic components of words and sentences, understanding meaning and syntax, and lexical and comprehension processes in reading.
3) Theories of speech perception such as categorical perception and the motor theory are examined, as are models of reading such as the interactive-activation model of lexical access. Representing text through propositional structures and mental models is also addressed.