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Related Experiment Videos

Support for a continuous (single-process) model of recognition memory and source memory.

Scott D Slotnick1, Chad S Dodson

  • 1Department of Psychology, Boston College, Chestnut Hill, MA 02467, USA. sol.slotnick@bc.edu

Memory & Cognition
|May 27, 2005
PubMed
Summary
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Memory retrieval is a continuous process, not all-or-none. Receiver operating characteristic (ROC) curves for source memory are naturally curvilinear, supporting continuous memory retrieval models like the unequal variance model.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • The nature of memory retrieval (continuous vs. all-or-none) is debated.
  • Receiver operating characteristic (ROC) curve shapes (curvilinear vs. linear) are used to infer retrieval processes.
  • Previous studies on source memory yielded conflicting ROC findings.

Purpose of the Study:

  • To resolve inconsistencies in source memory ROC findings.
  • To determine if memory retrieval is continuous or all-or-none.
  • To evaluate the applicability of the unequal variance model to source memory.

Main Methods:

  • Analysis of receiver operating characteristic (ROC) curves in memory retrieval tasks.
  • Comparison of curvilinear (continuous retrieval) and linear (all-or-none retrieval) ROC models.

Related Experiment Videos

  • Investigation of the impact of nondiagnostic information on ROC shape.

    • Main Results:

    • Source memory ROCs are inherently curvilinear.
    • Apparent linearity in ROCs can arise from including nondiagnostic source information.
    • The unequal variance model successfully explained both recognition and source memory ROCs.

    Conclusions:

    • Memory retrieval, including source memory, operates via a continuous process.
    • The unequal variance signal detection model provides a unified account for memory retrieval processes.
    • Nondiagnostic information can obscure the true continuous nature of memory retrieval.