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Weighted Mean00:57

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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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The multiple-weighting-systems hypothesis: theory and empirical support.

Dragan Rangelov1, Hermann J Müller, Michael Zehetleitner

  • 1Ludwig-Maximilians-Universität München, Germany. rangelov@psy.lmu.de

Attention, Perception & Psychophysics
|December 14, 2011
PubMed
Summary

The dimension repetition effect (DRE) and task-switch cost (TSC) are linked by criterion-specific intertrial sequence effects. A multiple-weighting-systems (MWS) hypothesis better explains these cognitive phenomena than single-mechanism accounts.

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Area of Science:

  • Cognitive Psychology
  • Human Perception
  • Decision Making

Background:

  • The dimension repetition effect (DRE) shows faster responses when task-relevant perceptual dimensions repeat.
  • Task-switch cost (TSC) demonstrates slower responses when tasks change between trials.
  • Both DRE and TSC have been studied independently, with separate explanatory mechanisms.

Purpose of the Study:

  • To explore conceptual similarities between DRE and TSC.
  • To introduce "criterion-specific intertrial sequence effects" as a unifying concept.
  • To evaluate single-mechanism versus multiple-mechanism explanations for these effects.

Main Methods:

  • Review of existing literature on DRE and TSC.
  • Introduction and elaboration of the multiple-weighting-systems (MWS) hypothesis.
  • Design and execution of two novel experiments to test MWS predictions.

Main Results:

  • Evidence suggests single-mechanism explanations are insufficient for both DRE and TSC.
  • The MWS hypothesis offers a more comprehensive account of intertrial sequence effects.
  • Experimental results support the predictions derived from the MWS hypothesis.

Conclusions:

  • DRE and TSC are likely manifestations of broader criterion-specific intertrial sequence effects.
  • The multiple-weighting-systems (MWS) hypothesis provides a robust framework for understanding these effects.
  • Future research should consider multiple independent mechanisms in explaining sequential effects in cognition.