pymetrics Money Exchange 2: Practise Giving, Keeping and Taking

What the pymetrics Money Exchange 2 game looks at

Money Exchange 2 is based on the dictator game. pymetrics’ patent describes it: you and another participant start with equal amounts, then one of you receives extra money and decides how much of it to give away. Prep sites describe two rounds with $5 each and an extra $5. First a partner holds the extra money and decides while you watch, and you rate how fair the result was. Then a new partner arrives and you decide, with the option to give, keep or even take some of your partner’s $5.

There is no right split. pymetrics says its games have no right or wrong answers, and Harver lists fairness and generosity among the trait areas its games cover. In research, the dictator game is usually read as generosity and how you weigh your own gain against someone else’s. pymetrics compares how you play with people who do well in the role, not with a fixed answer.

Candidate Falcon’s practice follows the prep-site description, with $0.50 steps taken from one prep site’s reconstruction and a 0–10 fairness scale. The first partner is simulated: its decision is drawn from a list we designed, because pymetrics does not publish how its partners decide.

How the Money Exchange 2 practice works

1. Press Start practice. You and your partner each have $5, and in round 1 your partner holds an extra $5.
2. See what your partner did with the extra $5, then rate how fair it was from 0 (very unfair) to 10 (very fair).
3. In round 2 a new partner arrives and you hold the extra $5.
4. Use the slider, the − and + buttons or the arrow keys to give up to $5, keep it, or take up to $5 from your partner, in $0.50 steps. Then confirm.
5. Rate how fair your own split is, then review both rounds side by side.

Money Exchange 2 tips

• Decide as you would with real money. pymetrics says there is no right answer.
• Check the two totals above the slider before you confirm, so the split is the one you mean.
• The slider starts in the middle, which means keeping the extra $5 and giving nothing. Left of the middle takes, right of it gives.
• Rate each split on its own terms. Your two ratings do not need to match.
• Our practice is untimed, so take a moment before you confirm.

Common Money Exchange 2 mistakes

• Treating the slider position as a score. No split is correct.
• Confirming without checking whether the slider is on the give side or the take side.
• Assuming you have to repeat what the first partner did with you.
• Copying a strategy from a forum instead of answering naturally.

A short Money Exchange 2 practice routine

1. Play one run, then compare what the partner did, what you did and how you rated each.
2. Play Money Exchange 1, the trust game, which asks the same fairness question in a different situation.
3. Play again on another day; the first partner’s decision changes between sessions.
4. Before the real assessment, play once more so the slider feels familiar, then answer naturally.

Money Exchange 2 FAQ

Practise other pymetrics games

• Money Exchange 1 practice
• Balloons practice
• Cards practice

Sources

• pymetrics patent WO2015200880A1: data-driven identification of talent
• Wilson et al. (2021), Building and Auditing Fair Algorithms, with pymetrics co-authors (PDF)
• Harver: gamified assessments