The following kinds of articles are appropriate for the journal: (a) theories or theoretical analyses of knowledge representation, cognitive processes, and brain theory; (b) experimental or ethnographic studies relevant to theoretical issues in cognitive science; (c) descriptions of intelligent programs that exhibit or model some human ability; (d) design proposals for cognitive models; (e) protocol or discourse analysis of human cognitive processing; (f) discussions of new problem areas or methodological issues in cognitive science; and (g) short theoretical notes or rebuttals. The journal will publish four categories of articles.