It is widely agreed that much second language vocabulary learning occurs incidentally while the learner is engaged in extensive reading. After a decade of intensive research, however, the incidental learning of vocabulary is still not fully understood, and many questions remain unsettled. Key unresolved issues include the actual mechanism of incidental acquisition, the type and size of vocabulary needed for accurate guessing, the degree of exposure to a word needed for successful acquisition, the efficacy of different word-guessing strategies, the value of teaching explicit guessing strategies, the influence of different kinds of reading texts, the effects of input modification, and, more generally, the problems with incidental learning. This article briefly surveys the empirical research that has been done on these issues in recent years.

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This article delineates five forms of textual elision or `silence': speech—act silences, presuppositional silences, discreet silences, genre-based silences and manipulative silences. Manipulative silence receives extended attention, as it is felt to be the most ideologically powerful form of silence in public discourse. A case study on the discourse of homelessness, drawing on a corpus of 163 newspaper articles and editorials published in the US during early 1999, is used to illustrate how manipulative silences work and, more importantly, how they can be systematically identified by the discourse analyst. The article concludes with a discussion of the notion of authorial `intentionality'.

This article argues for an activity-based theory of genre knowledge. Drawing on empirical findings from case study research emphasizing “insider knowledge” and on structuration theory, activity theory, and rhetorical studies, the authors propose five general principles for genre theory: (a) Genres are dynamic forms that mediate between the unique features of individual contexts and the features that recur across contexts; (b) genre knowledge is embedded in communicative activities of daily and professional life and is thus a form of “situated cognition”; (c) genre knowledge embraces both form and content, including a sense of rhetorical appropriateness; (d) the use of genres simultaneously constitutes and reproduces social structures; and (e) genre conventions signal a discourse community's norms, epistemology, ideology, and social ontology.

Nonnative speakers have long been known to have trouble understanding academic lectures. ESP researchers and teachers agree that the problem lies mainly at the discourse level, not at the sentence level; accordingly, a body of discourse-oriented teaching materials for lecture comprehension is now on the market. Though a step in the right direction, these materials fail to do justice to the rhetorical, strategic nature of academic lectures. As our study shows, students may understand all the words of a lecture (including lexical connectives and other discourse markers) and yet fail to understand the lecturer's main points or logical argument. Our study was an exploratory one. Fourteen NNS graduate and undergraduate students watched an authentic 16minute videotaped lecture on a topic in mechanical engineering and then were asked to provide immediate-recall summaries, which were then analyzed in consultation with the lecturer. Although the lecture was clerly structured around several main points, most of the students failed to grasp these points. These results are discussed in terms of listening strategies: the successful students used a "point-driven" strategy while the unsuccessful ones used an "information-driven" strategy. We conclude that students should be taught how to listen to lectures in a more rhetorical, strategic way. More generally, if we are to teach students to understand and communicate more effectively, we should help them see how the organization of their discourse fits into the larger goals, agendas, and contexts in their fields.