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and interpersonal planes of discourse. Operating on both the global and local
coherence levels, cohesive devices facilitate the establishment of lexical
and grammatical links between parts of the text and between the text and its
context. Within the present approach, grammatical and lexical mechanisms for
establishing cohesion relations are regarded as interdependent. The categorization
of grammatical cohesive means generally follows Halliday and Hasan’s (1989)
framework, although, in agreement with Cornish’s (2008) cognitive approach,
reference interpretation is extended to encompass both deictic and anaphoric
reference, since they are regarded as referring directly to mental representations
and not to the occurrence of lexical or grammatical items in the text. The
interpretation of lexical cohesion relations is seen as a collaborative achievement
of the interactants which is dependent on their background knowledge through
the knowledge of routines, activity types and complex schemata motivated
socially, culturally and ideologically (Tanskanen 2006); thus it is associated with
evaluation and interpersonal coherence. By participating in the build-up of local
or global cohesive chains, lexical and grammatical cohesive means help maintain
the availability of referents, action and events in the mental representations of the
interactants, while by establishing their referents as thematic across larger parts
of the text, cohesive chains indicate the boundaries of global and local topical
segments. The cohesive role of discourse markers to indicate discourse topic
shifts and to make explicit logical relations holding in the unfolding discourse
enhances the perception of ideational coherence (cf. Povolná 2010).
The above discussion of aspects of coherence suggests that the perception
of coherence stems from the interplay of meanings derived on all planes of
discourse. When constructing a discourse world the speaker/writer projects
into the discourse his/her culturally, experientially and ideologically-biased
judgements and attitudes and assigns status and value to actors, events and
actions related to them. Thus ideational and interpersonal meanings can be
seen as contributing jointly to the efforts of the speaker/writer to impose his/
her ideological perspective and to persuade the listener/reader to accept the
suggested perception of discourse coherence. The listener/reader, however, may
not understand or accept the point of view of the speaker/writer and construct a
different discourse world which agrees with the culturally-, experientially- and
ideologically-biased point of view of the listener/reader, but diverges from the
discourse interpretation intended by the speaker/writer.
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