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The confidence coefficient is also known as the confidence level or degree of confidence. It is the percent expression for the probability, 1-α, that the confidence interval contains the true population parameter assuming that the confidence interval is obtained after sufficient unbiased sampling; for example, if the CL = 90%, then in 90 out of 100 samples the interval estimate will enclose the true population parameter. Here α is the area under the curve, distributed equally under both the...
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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
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[Relationship between recognition judgments and confidence ratings for repeated test items].

Akira Takahashi1

  • 1Faculty of Informatics, Shizuoka University, Jo-hoku, Hamamatsu, Shizuoka 432-8011, Japan. akirtaka@inf.shizuoka.ac.jp

Shinrigaku Kenkyu : the Japanese Journal of Psychology
|January 29, 2009
PubMed
Summary

Participants showed a positive correlation between confidence and performance for old items but a negative correlation for new items in recognition tasks. This indicates source monitoring errors, where memory accuracy is impacted by misattributing item origins.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Recognition memory involves judging whether an item has been encountered before.
  • Confidence ratings provide insight into the subjective certainty of memory judgments.
  • Source monitoring errors occur when individuals misattribute the origin of a memory.

Purpose of the Study:

  • To investigate the relationship between confidence and accuracy in recognition memory tasks.
  • To examine the occurrence and impact of source monitoring errors.
  • To analyze how performance and confidence differ for old versus new items across repeated tasks.

Main Methods:

  • Eighty-nine participants completed two recognition judgment and confidence rating tasks.
  • New items in the second task included previously presented old items.
  • Response data were analyzed for correlations between confidence and performance.

Main Results:

  • A positive correlation between confidence and performance was found for old items.
  • A negative correlation between confidence and performance was observed for new items.
  • A strong negative correlation occurred when previously presented items were mistakenly identified as new, indicating source monitoring errors.

Conclusions:

  • Confidence reliably predicts performance for correctly recognized old items.
  • A negative confidence-performance correlation suggests source monitoring errors, impacting memory accuracy.
  • Awareness of source misattributions is crucial for understanding recognition memory reliability.