Three mini-essays review the progress made on two traditional problems
and one newer problem in discourse understanding. The first tradition
al problem is the relationship between individual sentences and discou
rses. The role of discourse factors on sentence comprehension has rece
ived continuing attention, whereas the complementary question of sente
nces' contribution to discourse comprehension has been neglected. Rece
nt work may have redressed this neglect to some extent. The second tra
ditional topic is individual differences in discourse comprehension; t
he conclusion is that there has been substantial refinement of earlier
hypotheses about the basic word and functional memory sources of such
differences, whereas research on higher level causal factors remains
inconclusive. The newer third problem, the representation of multiple
texts, exposes fresh views of problems of discourse, especially the co
ntrast between situation and text models. A recent representational Do
cuments Model is briefly described. The conclusion suggests some unify
ing threads among these three problems.