Pupillometry reveals increased pupil size during indirect request comprehension
SourceThe Quarterly Journal of Experimental Psychology, 69, 6, (2016), pp. 1093-1108
Article / Letter to editor
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SW OZ DCC BO
SW OZ DCC PL
The Quarterly Journal of Experimental Psychology
SubjectDI-BCB_DCC_Theme 1: Language and Communication; Psycholinguistics
Fluctuations in pupil size have been shown to reflect variations in processing demands during lexical and syntactic processing in language comprehension. An issue that has not received attention is whether pupil size also varies due to pragmatic manipulations. In two pupillometry experiments, we investigated whether pupil diameter was sensitive to increased processing demands as a result of comprehending an indirect request versus a direct statement. Adult participants were presented with 120 picture-sentence combinations that could be interpreted either as an indirect request (a picture of a window with the sentence it's very hot here) or as a statement (a picture of a window with the sentence it's very nice here). Based on the hypothesis that understanding indirect utterances requires additional inferences to be made on the part of the listener, we predicted a larger pupil diameter for indirect requests than statements. The results of both experiments are consistent with this expectation. We suggest that the increase in pupil size reflects additional processing demands for the comprehension of indirect requests as compared to statements. This research demonstrates the usefulness of pupillometry as a tool for experimental research in pragmatics.
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