Related Experiment Video
Updated: Jul 16, 2026
08:24
The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
Published on: August 25, 2023
Is deck B a disadvantageous deck in the Iowa Gambling Task?
Ching-Hung Lin1, Yao-Chu Chiu, Po-Lei Lee
1Institute of Neuroscience, School of Life Science, National Yang-Ming University, Taipei, Taiwan. eandy924@ms42.hinet.net
Behavioral and Brain Functions : BBF
|March 17, 2007
Summary
The Iowa Gambling Task (IGT) shows people prefer disadvantageous Deck B despite uncertainty. This "prominent deck B" phenomenon persists even when participants can use a "gain-stay, loss-shift" strategy.
Area of Science:
- Decision Science
- Behavioral Economics
- Cognitive Psychology
Background:
- The Iowa Gambling Task (IGT) is a key measure of decision-making under uncertainty.
- A documented anomaly,
- prominent deck B,
- shows participants favor a disadvantageous deck (B) over advantageous ones (C, D).
- This contradicts core IGT assumptions, often masked by data aggregation methods.
Purpose of the Study:
- To empirically verify the
- prominent deck B
- phenomenon.
- To investigate decision-making patterns in a modified IGT with balanced outcomes.
Main Methods:
- A two-stage, simplified Iowa Gambling Task (AACC and BBDD versions) was employed.
- This design balanced gain-loss structures and allowed preference monitoring after 100 trials.
Main Results:
- The
- prominent deck B
- phenomenon was confirmed in experimental results.
- Participants consistently preferred Deck B, even under uncertainty and with strategic options.
- Findings align with emerging research contradicting IGT's basic assumptions.
Conclusions:
- Participants can employ a
- gain-stay, loss-shift
- strategy to navigate uncertainty.
- The magnitude of losses did not deter participants from choosing the disadvantageous Deck B.
