Trust the card, not the resemblance
On a misaligned card, a public forfeit of 5 makes Trust and Keep the equilibrium. The SAME/DIFFERENT label changes no score. The computer only deals the cards.
How to sit
- Promiser. You see a payoff card and choose Keep or Break. The other person cannot see this choice.
- Hand the computer over. Look away.
- Decider. You see the same card and a label, SAME or DIFFERENT. You do not see what the Promiser chose. You choose Trust or Verify.
- The round is revealed. Points are not money. There are 12 rounds. The explanation of the equilibrium is shown only at the end.
The label says whether a displayed priority matches the Decider. It does not change anyone's points, and it cannot remove the forfeit.
Seven classroom pairs have already played code 206. On the forfeit card, Trust was 26/28 and Keep stayed 15/28. Those cards were rounds 5, 7, 11, and 12, so the rise in Trust is mixed with order. Aligned Trust was 16/28, not higher than Trust on a misaligned card with no forfeit (18/28). That record is exploratory. It is not this sitting.
Leave the code blank for a new shuffle. Nothing is uploaded. An AI does not play either role.
Promiser, this card is yours
Hand the computer to the Decider
Promiser, look away. The choice you just locked is hidden.
Decider, you cannot see their choice
| Your choice | If they Keep | If they Break |
|---|---|---|
| Trust | +6 | −4 |
| Verify | +2 | +2 |
This round
What the table says
These lines are the equilibria of the cards. They are not a summary of how you played.
- Aligned card: Keep pays the Promiser 6 and Break pays 3. The equilibrium is Trust and Keep.
- Misaligned card, no forfeit: Break pays 10. The equilibrium is Verify and Break.
- Misaligned card, forfeit of 5: Break pays 5. The equilibrium is Trust and Keep. The Decider still gets −4 if the Promiser breaks. The 5 points are not transferred.
SAME or DIFFERENT is not a row in the table. Trust is worth as much as Verify only when the other person keeps at least 60 percent of the time. On these cards the Promiser has a strictly better action, so the equilibrium does not use that percentage.
This file is the record. Until a person plays, it is not a behavioral result. A click-through by the author is an interface test.
COMSCI/ECON 206 · Final project · Team FP12 · Muhan Chen. Static page: nothing is stored on a server. The model commit is b1380f7. Palette: strategy #0072B2, interdisciplinary #009E73, leadership #E69F00, Nobel and peer learning #CC79A7, ink #111111, surface #F5F7FA, divider #D9D9D9. Labels repeat what the color marks.