Understanding Confidence in Decision Making with Dots
Author Information
Author(s): Xue Kai, Shekhar Medha, Rahnev Dobromir
Primary Institution: Georgia Institute of Technology
Hypothesis
How do internal representations affect confidence in multi-alternative perceptual decision making?
Conclusion
The study found that confidence is best explained by the difference in evidence between the two most likely choices.
Supporting Evidence
- The internal representation for stimuli can be described with a simple, one-parameter equation.
- Confidence is based on the difference of the two alternatives with the largest evidence.
- The predictions of traditional theories of confidence were falsified in the experiments.
Takeaway
This study shows that when people make decisions about colors, their confidence is based on how different the top two choices are, not just on how many dots there are.
Methodology
Two experiments were conducted where subjects judged the dominant color in a cloud of differently colored dots and rated their confidence.
Potential Biases
Potential biases in color preference were not fully addressed in the model.
Limitations
The study may not account for individual differences in color biases and the complexity of real-world decision-making.
Participant Demographics
40 participants (25 in Experiment 1, 15 in Experiment 2), with a mean age of 19.7 years, including 20 females.
Statistical Information
P-Value
p = 7.13 x 10^-11
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website