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Related Experiment Videos

ROCs in recognition with and without identification.

Anne M Cleary1

  • 1Department of Psychology, Iowa State University, Ames, IA 50011-3180, USA. acleary@iastate.edu

Memory (Hove, England)
|July 16, 2005
PubMed
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This study analyzed word fragment recognition, finding that unidentified fragments showed linear signal detection patterns, unlike identified fragments which had both linear and quadratic components. Global matching models partially explained these memory effects for unidentified items.

Area of Science:

  • Cognitive Psychology
  • Memory Research
  • Signal Detection Theory

Background:

  • Receiver operating characteristics (ROCs) are used to analyze recognition memory.
  • Understanding the processes underlying the recognition of word fragments is crucial for memory research.

Purpose of the Study:

  • To compare ROCs for identified versus unidentified word fragments.
  • To investigate the applicability of global matching models within signal detection theory to explain memory for unidentified word fragments.

Main Methods:

  • Analysis of z-transformed ROCs (z-ROCs) under different recognition conditions.
  • Comparison of linear and quadratic components of z-ROCs.
  • Testing predictions of global matching models against experimental data.

Related Experiment Videos

Main Results:

  • z-ROCs for unidentified word fragments were linear with slopes near 1.0.
  • z-ROCs for identified word fragments exhibited both linear and quadratic components with slopes less than 1.0.
  • Global matching models predicted memory effects for strong and weak items; only the effect for weak items was observed for unidentified items.

Conclusions:

  • Recognition of unidentified word fragments appears to rely on a familiarity process.
  • Global matching models provide a partial explanation for memory performance on unidentified word fragments.
  • Distinct signal detection patterns differentiate recognition with and without identification.