← Andover Economics Society

Decision
Lab.

Five tasks. Each one reveals something different about how you think under uncertainty.

~5 minutes · Five tasks · Anonymous responses collected for research

This data is collected for research on decision-making conducted by the Andover Economics Society. Responses are accessible to AES and may be included in published findings.

Task A · 1 of 6

Higher or lower?

Don't look it up. Go with your gut.

What percentage of UN member states are from Africa?

Drawing anchor…

–

Range: 0 – 100

Is the actual percentage higher or lower than this? Move the slider to show your estimate.

Your estimate 0%
0% 100%
Difference from anchor: 0
Task B · 2 of 6

A public health decision.

Read carefully and choose.

Decision

Please make a selection before continuing.
Task C · 3 of 6

A theater decision.

Read it once.

Do you buy a ticket?

Please select one of the options above.
Task D · 4 of 6

A knowledge question.

Click to set your earliest bound: the lowest year your 90% confidence interval should include.

What year was the first networked email sent?

Set your bounds so you're 90% confident the true year falls between them.

1940 1983 2026
Set both endpoints before continuing.
Task E · 5 of 6

A simple choice.

Same expected value. Go with your instinct.

Decision

Both options have the same expected value. Which do you prefer?

Please make a selection before continuing.
Attention · 6 of 6

One quick check.

Select the option that matches the instruction.

For this question, select "Confirm".

Please select an option to continue.
Scoring your five responses...
Measuring your anchoring response…
Checking framing and sunk costs…
Building your bias profile…

One more thing.

Optional. Takes 20 seconds. Helps contextualize the data.

Session code

From the flyer. Required to submit your responses to the study.

Incorrect code. Your results won't be submitted.

Gender

Economics background

Informal = self-study, reading, or work experience; Coursework = formal classes; Extensive = major, graduate work, or career.

Age

All responses are anonymous. We do not collect your name, email address, or any directly identifying information. We collect an anonymized device signature solely to prevent duplicate submissions. This data is collected for research on decision-making conducted by the Andover Economics Society. Responses are accessible to AES and may be included in published findings. You may stop at any time.

Your answers only contribute to the study if you complete this section.

Your experiment breakdown
Back to AES

Bibliography

Campbell, S., & Moore, D. A. (2024). Overprecision in the Survey of Professional Forecasters. Collabra: Psychology, 10(1), 92953. https://doi.org/10.1525/collabra.92953

Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291.

Li, C., & Feldman, G. (2025). Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999). Royal Society Open Science, 12(9), 250979. https://doi.org/10.1098/rsos.250979

Moore, D. A., & Healy, P. J. (2008). The trouble with overconfidence. Psychological Review, 115(2), 502–517.

Simmons, J. P., & Nelson, L. D. (2014). The "Exactly" replication: Tversky & Kahneman's (1981) framing effect is robust to precise wording. Data Colada. http://datacolada.org/11

Thaler, R. H. (1999). Mental accounting matters. Journal of Behavioral Decision Making, 12(3), 183–206.

Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124–1131.

Tversky, A., & Kahneman, D. (1981). The framing of decisions and the psychology of choice. Science, 211(4481), 453–458.