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Field
Intervention (Public)
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Before
Participants complete binary lottery choice tasks over seven sessions, each on a separate day.
In Sessions 1–6 (Treatment Sessions), participants complete tasks under each of the six conditions, one condition per session, in a randomized order. In the benchmark condition (C0), participants directly choose between two lotteries. In the default condition (C1), one lottery is randomly assigned as the default, and the participant decides whether to keep it or switch. In the delegation condition (C2), participants may choose a lottery directly or delegate the decision to a fair coin flip. In the advice condition (C3), participants may choose directly or request a random assignment that they can then keep or switch. In the default–delegation condition (C4), one lottery is randomly assigned as the default, and the participant decides whether to keep it, switch to the other lottery, or delegate the decision to a fair coin flip. In the default–advice condition (C5), one lottery is randomly assigned as the default, and the participant decides whether to keep it, switch to the other lottery, or request a randomized recommendation that can then be accepted or rejected.
In Session 7 (Elicitation Session), participants make direct choices only, with each choice presented twice.
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After
Participants complete binary lottery choice tasks over seven sessions, each on a separate day.
In Sessions 1–6 (Treatment Sessions), participants complete tasks under each of the six conditions, one condition per session, in a randomized order. In the benchmark condition (C0), participants directly choose between two lotteries. In the default condition (C1), one lottery is randomly assigned as the default, and the participant decides whether to keep it or switch. In the delegation condition (C2), participants may choose a lottery directly or delegate the decision to a fair coin flip. In the advice condition (C3), participants may choose directly or request a random assignment that they can then keep or switch. In the default–delegation condition (C4), one lottery is randomly assigned as the default, and the participant decides whether to keep it, switch to the other lottery, or delegate the decision to a fair coin flip. In the default–advice condition (C5), one lottery is randomly assigned as the default, and the participant decides whether to keep it, switch to the other lottery, or request a randomized recommendation that can then be accepted or rejected.
In Session 7 (Elicitation Session), participants make direct choices only, with each choice presented three times in randomized order.
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Field
Experimental Design (Public)
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Before
This is a within-subject experiment with six treatment conditions. Participants complete Sessions 1–6 under each of the six conditions (64 choices per session), with condition order randomized across participants. Session 7 is the Elicitation Session, consisting of 128 binary lottery choices under the benchmark (direct choice) condition, with each choice set repeated to allow measurement of choice stochasticity. Participants complete each session on a separate day.
Each lottery pair consists of two lotteries with four equiprobable monetary outcomes. Lottery pairs are drawn from 16 parameterized choice sets grouped into three categories: (1) "hard" choices where lotteries have equal expected values but differ in dispersion; (2) epsilon-perturbed repetitions of hard choices with small expected value differences; and (3) "easy" choices where one lottery has a clearly higher expected value. Choice set parameters are randomly generated within pre-specified ranges.
Participants share some choice sets across conditions (for cross-condition comparisons) and face some choice sets unique to each condition (to reduce perceived repetition). At the end of the experiment, one decision is randomly selected for payment.
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After
This is a within-subject experiment with six treatment conditions. Participants complete Sessions 1–6 under each of the six conditions (64 choices per session), with condition order randomized across participants. Session 7 is the Elicitation Session, consisting of 192 binary lottery choices under the benchmark (direct choice) condition, with each choice set presented three times in randomized order to allow measurement of choice stochasticity. Participants complete each session on a separate day.
Each lottery pair consists of two lotteries with four equiprobable monetary outcomes. Lottery pairs are drawn from 16 parameterized choice sets grouped into three categories: (1) "hard" choices where lotteries have equal expected values but differ in dispersion; (2) epsilon-perturbed repetitions of hard choices with small expected value differences; and (3) "easy" choices where one lottery has a clearly higher expected value. Choice set parameters are randomly generated within pre-specified ranges.
Participants share some choice sets across conditions (for cross-condition comparisons) and face some choice sets unique to each condition (to reduce perceived repetition). At the end of the experiment, one decision is randomly selected for payment.
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Field
Planned Number of Observations
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Before
Around 500 * 512 = 256,000 (number of participants × number of choice tasks per participant).
All participants complete all six conditions (within-subject design). Each participant makes 64 decisions per treatment condition in Sessions 1–6 and 128 decisions in the Elicitation Session (Session 7), for a total of 512 decisions per participant.
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After
Around 500 * 576 = 288,000 (number of participants × number of choice tasks per participant).
All participants complete all six conditions (within-subject design). Each participant makes 64 decisions per treatment condition in Sessions 1–6 and 192 decisions in the Elicitation Session (Session 7), for a total of 576 decisions per participant.
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