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Brain Sci. 2020 Dec 06;10(12). doi: 10.3390/brainsci10120940.

Does Human Touch Facilitate Object Categorization in 6-to-9-Month-Old Infants?.

Brain sciences

Girija Kadlaskar, Sandra Waxman, Amanda Seidl

Affiliations

  1. Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN 47906, USA.
  2. Department of Psychology, Northwestern University, Evanston, IL 60208, USA.

PMID: 33291300 PMCID: PMC7762182 DOI: 10.3390/brainsci10120940

Abstract

Infants form object categories in the first months of life. By 3 months and throughout the first year, successful categorization varies as a function of the acoustic information presented in conjunction with category members. Here we ask whether tactile information, delivered in conjunction with category members, also promotes categorization. Six- to 9-month-olds participated in an object categorization task in either a touch-cue or no-cue condition. For infants in the touch-cue condition, familiarization images were accompanied by precisely-timed light touches from their caregivers; infants in the no-cue condition saw the same images but received no touches. Only infants in the touch-cue condition formed categories. This provides the first evidence that touch may play a role in supporting infants' object categorization.

Keywords: categorization; communication; infants; non-speech; touch

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