188.8.131.52 Interruptions and overlap
There is one case of interruption in the discussion, and one of overlap. The overlap occurs at line 52 when both speakers simultaneously self-select after a pause of two seconds following G9's turn. After 1.5 seconds of unclear overlapping speech, G10 stops talking and G9 carries on. Normally, however, there is a small pause between speakers taking the floor (eg. at lines 11, 19, 20, 23). This gives the discussion a degree of formality, and allows the boundaries between speaker turns to be very distinct. The pauses, rather than latching, between turns and the single instance of overlap, are properties of a non-co-operative, rather than a co-operative discussion.
The interruption occurs at line 49, when G10 interrupts G9. G10 mitigates her interruption with the phrase "I know", which reduces the extent of the explicit disagreement. This is a case of G10 using a competitive feature, but mitigating it with a co-operative feature:
48. G9: I mean it's good if somebody does that you know it's
49. G9: extra (.) it's good for them a.
G10: I know but (.) I mean this
50. G10: isn't really about what a teacher's job is (.) it's what you
51. G9: =I suppose (.) so
G10: would like in a good teacher=
Thus both speakers are generally non-co-operative in their use of overlap, while G10 does make one point by using a competitive feature.
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