Exact Number Concepts Are Limited to the Verbal Count Range

Overview

Journal Psychol Sci

Specialty Psychology

Date 2022 Feb 8

PMID 35132893

Authors

Benjamin Pitt

Edward Gibson

Steven T Piantadosi

Affiliations

Soon will be listed here.

Abstract

Previous findings suggest that mentally representing exact numbers larger than four depends on a verbal count routine (e.g., "one, two, three . . ."). However, these findings are controversial because they rely on comparisons across radically different languages and cultures. We tested the role of language in number concepts within a single population-the Tsimane' of Bolivia-in which knowledge of number words varies across individual adults. We used a novel data-analysis model to quantify the point at which participants ( = 30) switched from exact to approximate number representations during a simple numerical matching task. The results show that these behavioral switch points were bounded by participants' verbal count ranges; their representations of exact cardinalities were limited to the number words they knew. Beyond that range, they resorted to numerical approximation. These results resolve competing accounts of previous findings and provide unambiguous evidence that large exact number concepts are enabled by language.

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