As the field matured, N400 data not only helped to answer classic, often subdiscipline-specific questions, but to raise new ones – about the validity of long-standing theoretical dichotomies, the reality of certain core cognitive and linguistic constructs, and, indeed, the separability of the sub-disciplines themselves. Accordingly, many studies in the literature of this time are difficult to neatly categorize into broad domains, as above. Instead, N400 work highlighted the complex interactions between – and inherent neural inseparability of – perception, attention, memory, language, and meaning.
