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- W2772857319 abstract "When Input and Output Diverge: Mismatches in Gesture, Speech, and Image Alissa Melinger (melinger@coli.uni-sb.de) Department of Computational Psycholinguistics, Saarland University, Saarbrucken, 66041, Germany Sotaro Kita (sotaro.kita@bristol.ac.uk) Department of Experimental Psychology, 8 Woodland Road University of Bristol, Bristol BS8 1TN, United Kingdom representation, but they can also be influenced by ‘thinking for speaking’ operations on this representation. Discriminating between these theoretical alternatives is difficult because there is usually a close isomorphism between the semantic content of speech and the imagistic content of the representation speech is describing. Bearing on this discussion are recent studies demonstrating that gestures can convey complementary information to what is expressed in speech. For example, when describing their solutions to the Tower of Hanoi problem, speakers’ gestures sometimes corresponded to possible strategies that were not mentioned in the concurrent speech rather than to the strategy that was mentioned in speech. (Garber & Goldin-Meadow, 2002). The non- isomorphism between the content of speech and gesture has been referred to as speech-gesture mismatches. High rates of speech-gesture mismatches have also been reported for children who are in the transitional stage of acquiring the ability to correctly respond to the Piagetian conservation task (Church & Goldin-Meadow, 1986). Speech-gesture mismatches appear to contradict the claims of the Lexical Semantic Hypothesis in that they express information not included in speech. However, the information expressed by gesture in the speech-gesture mismatches does not actually conflict with either the linguistic or the imagistic representation; instead they provide complementary information. Thus, they do not provide a strong test of the competing theories. In this paper we employed perspective taking to create situations in which what was said conflicted with what was seen. Examining the behavior of gesture in these cases should discriminate between the competing hypotheses regarding gesture generation. The Lexical Semantics Hypothesis predicts that gestures will always align with the speech. The Free Imagery Hypothesis predicts that the gestures will always align with the image. The Interface Hypothesis predicts that gesture alignment will be influenced by ‘thinking for speaking’ processes and therefore the alignment of gesture could be to either or both representations, depending on the specific situation. Abstract The goal of the current paper is to investigate the behavior of gesture when the information conveyed by speech and the information conveyed by the image being described conflict as a result of perspective taking. To construct a corpus of speech-image mismatches, we designed a picture description elicitation procedure using path-like networks of colored circles. The results of our analysis demonstrate that gestures can be mismatched to both speech, as has been previously observed, and to the image, which has not been previously reported. The results provide insights into the nature of the representations that give rise to gestures. The Origin of Gesture This paper investigates the underlying cognitive processes involved in relating spatial information from a visual input to two separate output modalities, namely speech and gesture. Three theoretical possibilities have been proposed for how these three modalities of representation, visual- spatial, verbal and gestural, are related: The Lexical Semantic Hypothesis (Butterworth & Hadar, 1989; Schegloff, 1984), the Free Imagery Hypothesis (Krauss, Chen, & Chawla, 1996; Krauss, Chen, & Gottesman, 2000; but see de Ruiter, 1998, 2000 for another version of this hypothesis), and the Interface Hypothesis (Kita & Ozyurek, The Lexical Semantic Hypothesis (Butterworth & Hadar, 1989; Schegloff, 1984) proposes that gestures are generated from the semantics of the lexical items chosen to express the desired message. It predicts that gestures should always correspond to the meaning expressed by specific lexical items. In contrast, the Free Imagery Hypothesis (Krauss et al., 1996, 2000) claims that gestures are generated on the basis of pre-linguistic non-propositional representations; the strong reading of this proposal implies that the information conveyed by gesture should be unaffected by the specific lexical items selected during formulation and by the ‘thinking for speaking’ (Slobin, 1987, 1996) processes that convert the imagistic representation into propositional content (however, see below for alternative readings of this proposal). The Interface Hypothesis (Kita & Ozyurek, 2003) claims that gestures originate from a mediating representation connecting spatio-motoric representations in memory and linguistic representations. According to this view, gestures are generated from the imagistic Perspective Taking Perspective taking is a critical step required to express spatial relations in speech (cf. Miller & Johnson-Laird," @default.
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- W2772857319 date "2004-01-01" @default.
- W2772857319 modified "2023-09-28" @default.
- W2772857319 title "When Input and Output Diverge: Mismatches in Gesture, Speech, and Image" @default.
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