Prisoner's Dilemma
Can you trust your partner when betrayal is so tempting?
Betrayal Rate by Round
Do AI personas betray more as the endgame approaches?
Stag Hunt
Go for the big prize together, or play it safe alone?
Stag-Choice Rate by Round
Do AI personas sustain coordination, or cascade to the safe Rabbit choice?
Beauty Contest
It's not about what you like — it's about what you think everyone else thinks.
Winning Choice Distribution — Round 1
PMF of round-winning guesses (closest to ⅔ × mean). Lower choices signal deeper strategic reasoning.
Golden Ball
The ultimate test of friendship and greed.
Steal Rate by Round
How often do AI personas take it all — and does greed grow over rounds?
All-Pay Auction
The only auction where losing still costs you everything.
Bid Distribution — Round 1
PMF of first-round bids (prize = 100). Humans show escalation bias, AI closer to Nash.
Volunteer's Dilemma
Someone has to do the dirty work. Will it be you?
Volunteer Rate — Round 1
Probability of volunteering (N=5). Humans show higher volunteering due to altruism.
Public Goods Game
Will you contribute to the community or be a free rider?
Contribution Distribution — Round 1
PMF of contributions to public pool (endowment = 20). Humans show conditional cooperation, AI may defect more.
Colonel Blotto
Strategy is about where you choose NOT to fight.
Allocation Strategy Distribution — Round 1
PMF of allocation patterns (6 troops, 4 battlefields). Humans over-concentrate, AI spreads more.
Trolley Problem
A runaway trolley is coming. What is the value of a life?
Classic Trolley — Pull Lever or Do Nothing?
Most pull lever (redirect threat). AI shows higher utilitarian rate.
Fat Man Variant — Push or Do Nothing?
Most refuse to push (active killing). AI shows much higher utilitarian rate.
Ultimatum Game
How much is "fair" enough for you?
How Much of Its Money Does AI Offer?
Humans offer half the pot 50% of the time — does AI do the same?
% of wealth offered to other player
Does AI Have Pride? Rejection Rate by Offer Received
Saying no means both walk away empty. 53% of humans still do it — pride over profit.
% of wealth offered by other player