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Adaptive decision processes in perceptual comparisons: effects of changes in the global difficulty context
Joseph V Baranski1, William M Petrusic
1Judgement and Decision Making Group, Defence Research and Development Canada, Toronto, Ontario. joe.baranski@drdc-rddc.gc.ca
Summary
Adaptive decision-making research shows that task difficulty changes impact response times and accuracy. Findings support theories suggesting decisions are based on more diagnostic information rather than just more information.
Area of Science:
- Cognitive Psychology
- Decision Science
- Human Factors
Background:
- Investigated adaptive decision processes under varying task difficulty.
- Examined how individuals adjust their decision-making strategies when faced with unexpected changes in task demands.
Purpose of the Study:
- To compare two theoretical frameworks for adaptive decision-making: accumulator theory and slow/fast guessing theory.
- To determine which theory better explains observed changes in decision time and accuracy under different stress conditions.
Main Methods:
- Experiments involved unexpected shifts in task difficulty (easy to difficult, difficult to easy).
- Participants completed tasks under accuracy stress and speed stress conditions.
- Decision time, accuracy, and rated confidence were measured.
Main Results:
- Under accuracy stress, increased decision time was observed when shifting from easy to difficult tasks, but not vice versa.
- Under speed stress, shifts to more difficult contexts led to reduced accuracy and confidence.
- The magnitude of these effects varied with decision difficulty.
Conclusions:
- Findings support the slow and fast guessing theory, which posits that decisions are based on more diagnostic information.
- This contrasts with accumulator theory, which suggests decisions are based on accumulating more information.
- The study provides empirical evidence for the role of information diagnosticity in adaptive decision-making.