22.214.171.124 Interruptions and overlap
There are no instances of co-operative overlap in the discussion; the discussion is not co-operative in this respect. There is one instance of interruption: B9 interrupts G12 at line 52 (cited above). G12 stops speaking after B9 has spoken over her for five words of her turn. Her turn is grammatically incomplete, and it is unclear whether she has completed the content of what she intended to say. B9 is apparently agreeing with G12 when he interrupts her, but he reiterates her point in his turn as if it were his original point, suggesting that this is in fact a competitive move to take the floor, rather than a co- operative one which aims to support the other speaker.
There are also two cases of overlap: B8 overlaps B9 at line 20, G11 overlaps B8 at line 69. In the first case, B8's utterance challenges B9's, suggesting that the overlap is a competitive move. In the second case G11 responds to a question asked by B8 before he had completed the question. When the length of turns in this discussion is taken into account, "jumping in" appears to be competitive behaviour, since a speaker gaining the floor in this way will hold it for a relatively long time, and thus exclude other group members from the opportunity of speaking.
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