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Infants' understanding of object-directed action.

Ann T Phillips1, Henry M Wellman

  • 1Seaver and New York Center of Excellence for Autism Research, The Mount Sinai Medical Center, Mount Sinai School of Medicine, One Gustave Levy Place, Box 1230, New York, NY 10029-6574, USA. ann.phillips@mssm.edu

Cognition
|November 26, 2005
PubMed
Summary

Twelve-month-old infants recognize intentional human actions. They understand that actions, like reaching, are directed towards specific objects, indicating early intentional stance development.

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Area of Science:

  • Developmental Psychology
  • Cognitive Science
  • Infant Perception

Background:

  • Understanding when infants recognize human actions as intentional and object-directed is crucial for developmental psychology.
  • Previous research suggests infants may begin to interpret actions based on goals by early infancy.

Purpose of the Study:

  • To investigate whether 12-month-old infants can discern that a human reach is directed towards a specific goal-object.
  • To assess infant sensitivity to the goal-directed nature of actions, even when movement paths change.

Main Methods:

  • A visual habituation technique was employed with 12-month-old infants.
  • Infants were habituated to an actor reaching for a ball over a barrier.
  • Test phases involved removing the barrier, presenting direct and indirect reach paths, and a control condition without a goal-object.

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Main Results:

  • In the presence of a goal-object, infants looked significantly longer at the indirect reach (old path, no barrier) compared to the direct reach (new path).
  • In control conditions without a goal-object, infants showed no preference between the direct and indirect test events.
  • This differential looking time indicates infants recognized the goal-directed nature of the original action.

Conclusions:

  • Sensitivity to human object-directed action is established by 12 months of age.
  • Infants can infer the goal of an action and evaluate the efficiency of the movement path.
  • Findings align with and extend previous research on infant intentionality and goal-encoding.