Perceiving affordances for aperture passage in an Environment-person-person system

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The authors investigated the perception of affordances for aperture passage in an environment-person-person (E-P-P) system, which comprised an adult perceiver and a child as a companion. Perceivers were 8 large and 8 small female undergraduates and were companioned with 1 large and 1 small girl. The perceivers perceptually judged the minimum aperture width for the E-P-P system, and then the adult-child dyads (a pair of people) actually walked through to determine the system's actual minimum aperture width. Results demonstrated that perceivers precisely judged the action capabilities of an E-P-P system on the basis of the body-scaled information of each adult-child dyad. The findings extended the previous concept of affordances for an environmentperson system to affordances for an E-P-P system.

Original languageEnglish (US)
Pages (from-to)495-500
Number of pages6
JournalJournal of Motor Behavior
Issue number6
StatePublished - 2009

Bibliographical note

Funding Information:
Preparation of the article was supported by the Taiwan National Science Council (NSC 96–2413-H-017–008). The authors thank Yen-Lin Kao and Ting-Ting Chang who helped with data collection.


  • Affordances
  • Aperture passage
  • Body-scaled information
  • Environment-person- person (E-P-P) system


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