Studies in readability from this period stressed the importance of higher textual dimensions, focusing on inference load (Kemper, 1983), conceptual density (Kintsch and Vipond, 1979), or organisational aspects (Meyer, 1982).
we replicated most features introduced in the literature described in section 2 and added new variables: the proportion of deictic pronouns, of resomptive anaphora and of adverbs, as well as the probability that a specific type of mention might open a co-reference chain in a given text.