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Examining Whether Semantic Cues Can Affect Felt Heaviness When Lifting Novel Objects.

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Area of Science:

  • Cognitive psychology
  • Perception science
  • Sensorimotor control

Background:

  • Object perception is influenced by both low-level stimulus properties and high-level cognitive expectations.
  • Previous research shows size-weight and material-weight illusions, but the role of semantic cues is less understood.

Purpose of the Study:

  • To investigate if semantic cues (labels) can induce a novel weight illusion.
  • To examine how semantic cues influence pre-lifting expectations and sensorimotor predictions of heaviness.

Main Methods:

  • Participants lifted equally-sized and weighted objects labeled 'light' or 'heavy'.
  • Perceived heaviness was reported pre- and post-lifting.
  • Fingertip forces during lifting were measured.

Main Results:

  • Labels influenced pre-lift-off expectations of heaviness.
  • No significant effect of labels on perceived heaviness or early lifting forces was observed.
  • Explicit semantic expectations did not override implicit expectations from object size.

Conclusions:

  • Semantic cues alone are insufficient to induce a weight illusion.
  • Cognitive expectations appear segregated, with explicit labels having less impact than implicit cues like object size.
  • This highlights the complex and variable influence of different types of expectations on perception and action.