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Reinforcer control and human signal-detection performance.

V Johnstone1, B Alsop

  • 1University of Otago, New Zealand.

Journal of the Experimental Analysis of Behavior
|June 24, 2000
PubMed
Summary
This summary is machine-generated.

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This study on signal detection found that criterion location measures are better indicators of response bias than likelihood ratio measures. Reinforcer ratios significantly influenced bias patterns in participants.

Area of Science:

  • Cognitive Psychology
  • Decision Science

Background:

  • Signal-detection theory is crucial for understanding perception and decision-making.
  • Response bias, a key component of signal-detection tasks, can be influenced by various factors, including reinforcement schedules.

Purpose of the Study:

  • To compare the effectiveness of criterion location measures versus likelihood ratio measures in assessing response bias.
  • To investigate how asymmetrical reinforcement ratios affect response bias under controlled and uncontrolled conditions.

Main Methods:

  • Eight human participants completed a two-choice signal-detection task with varying stimulus disparity.
  • Two procedures were used: a controlled procedure with a constant reinforcer ratio and an uncontrolled procedure where the ratio could vary.
  • Receiver operating characteristic (ROC) curves were analyzed to assess bias.

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Main Results:

  • Controlled procedure ROC patterns aligned with isobias functions predicted by criterion location measures.
  • Uncontrolled procedure ROC patterns were variable and showed extreme bias as discriminability decreased.
  • The obtained pattern of bias directly correlated with the obtained reinforcer ratio.

Conclusions:

  • Criterion location measures appear to be more reliable indices of response bias compared to likelihood ratio measures.
  • Reinforcer ratio dynamics significantly impact response bias in signal-detection tasks.
  • Understanding these dynamics is key for accurate interpretation of decision-making processes.