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Interpreting Silent Gesture: Cognitive Biases and Rational Inference in Emerging Language Systems
Author(s) -
Schouwstra Marieke,
Swart Henriëtte,
Thompson Bill
Publication year - 2019
Publication title -
cognitive science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.498
H-Index - 114
eISSN - 1551-6709
pISSN - 0364-0213
DOI - 10.1111/cogs.12732
Subject(s) - gesture , interpretation (philosophy) , ambiguity , inference , computer science , cognition , defeasible estate , word order , cognitive psychology , bayesian inference , scope (computer science) , natural language processing , cognitive science , artificial intelligence , linguistics , psychology , bayesian probability , philosophy , neuroscience , programming language
Natural languages make prolific use of conventional constituent‐ordering patterns to indicate “who did what to whom,” yet the mechanisms through which these regularities arise are not well understood. A series of recent experiments demonstrates that, when prompted to express meanings through silent gesture, people bypass native language conventions, revealing apparent biases underpinning word order usage, based on the semantic properties of the information to be conveyed. We extend the scope of these studies by focusing, experimentally and computationally, on the interpretation of silent gesture. We show cross‐linguistic experimental evidence that people use variability in constituent order as a cue to obtain different interpretations. To illuminate the computational principles that govern interpretation of non‐conventional communication, we derive a Bayesian model of interpretation via biased inductive inference and estimate these biases from the experimental data. Our analyses suggest people's interpretations balance the ambiguity that is characteristic of emerging language systems, with ordering preferences that are skewed and asymmetric, but defeasible.