Moral Mind: global experiments on moral evaluations

Last registered on September 01, 2025

Pre-Trial

Trial Information

General Information

Title
Moral Mind: global experiments on moral evaluations
RCT ID
AEARCTR-0016612
Initial registration date
August 24, 2025

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
September 01, 2025, 2:56 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

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Primary Investigator

Affiliation
Norwegian School of Economics

Other Primary Investigator(s)

PI Affiliation
Norwegian School of Economics
PI Affiliation
University of Bergen
PI Affiliation
Norwegian School of Economics

Additional Trial Information

Status
Completed
Start date
2022-06-01
End date
2024-02-01
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We target 62,000 participants across 60 countries, recruited by Gallup as part of the 2022 Gallup World Poll. Our study uses a subset of the poll and implements four randomized survey experiment modules. The modules cover: (1) perceptions of moral acceptability, (2) responsibility attributed to children of different ages for their productivity, (3) attitudes toward males and females falling behind in education and the labor market, and (4) cross-country heterogeneity in preferences for competition.

Data collection was conducted by Gallup, and data was stored in quarantine by the Office for Research Administration at NHH until analysis plans were registered online, at which point the data relevant to that analysis plan were made available for analysis (a gradual release of data).
External Link(s)

Registration Citation

Citation
Cappelen, Alexander W. et al. 2025. "Moral Mind: global experiments on moral evaluations." AEA RCT Registry. September 01. https://doi.org/10.1257/rct.16612-1.0
Experimental Details

Interventions

Intervention(s)
We had four different survey experiments: (1) perceptions of moral acceptability, (2) responsibility attributed to children of different ages for their productivity, (3) attitudes toward males and females falling behind in education and the labor market, and (4) cross-country heterogeneity in preferences for competition.

In the first experiment the task is to evaluate the the moral acceptability of a dictator decision in a real effort experiment. The random assignment is to one of two different dictator decisions to evaluate (high or low inequality). These were decisions made by others in a previous experiment.

In the second experiment, the task is to propose a division of earnings between two children that have done a small task. The random assignment is 2x2: The age of the children (both of the children are 7, or both of the children are 15 year old) and the source of initial inequality (pure luck, or performance in the task).

In the third experiment, the task is to express support for a group that has fallen behind in education / the labor market, and also belief about exerted effort of this group. The random assignment is 2x2: Whether the group to consider is male or female, and whether the belief about exerted effort is stated as a plain factual statement or as a causal statement for why this group has fallen behind.

In the fourth experiment, the task is to express agreement/disagreement with a statement about the importance of group being willing to compete against others. The random assignment is to whether this group is "girls" or "boys."

Random assignment is independent across experiments, and all random assignments are with equal probabilities.

Details of the interventions are provided in the relevant analysis plans, and also in the enclosed instrument.
Intervention (Hidden)
Intervention Start Date
2022-06-01
Intervention End Date
2023-12-31

Primary Outcomes

Primary Outcomes (end points)
Evaluation of moral acceptability, spectator decision on monetary allocation, belief about why genders fall behind in education and the labor market, support for genders that fall behind in education and the labor market, willingness to compete, the importance of people's willingness to compete
Primary Outcomes (explanation)
More details are provided in the analysis plans.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We target 62,000 participants across 60 countries, recruited by Gallup as part of the 2022 Gallup World Poll. Our questions form a subset of the poll. The survey is administered in two modes: Face-to-face interviews in countries without sufficient internet coverage; web surveys in countries with adequate internet coverage. Randomization at the individual level. Independent assignment to treatment for each of the four modules.

The survey (but not the intervention) was clustered in the face-to-face countries.
Experimental Design Details
Randomization Method
Computer
Randomization Unit
Individual
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
30000 individuals and 2000 clusters of 16 individuals.
Sample size: planned number of observations
62000
Sample size (or number of clusters) by treatment arms
Equally sized treatments arms within each module.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

Documents

Document Name
Instrument
Document Type
survey_instrument
Document Description
File
Instrument

MD5: 30d3e2780b05549644dcd949d401bd19

SHA1: c1f2053e4fc27516e77f1f63857a5b723cbc7a78

Uploaded At: August 24, 2025

IRB

Institutional Review Boards (IRBs)

IRB Name
NHH IRB
IRB Approval Date
2022-01-20
IRB Approval Number
NHH-IRB 34/22
IRB Name
Shanghai Ethics Committee For Clinical Research
IRB Approval Date
2023-09-10
IRB Approval Number
SECCR/2023-103-01
Analysis Plan

Analysis Plan Documents

Analysis Plan: Competitiveness Module

MD5: 82fbe8fc53a0187097af9a2c43eb3612

SHA1: 2cef4704fd0b0574a19c5cb671a501f613767d43

Uploaded At: August 24, 2025

Analysis Plan: Genders Falling Behind Module

MD5: e97ecb6f07e1a95700d90b655e070a49

SHA1: 9dcb11835863fc101c5fd8ae666c449afdf8ec59

Uploaded At: August 24, 2025

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Yes
Data Collection Completion Date
Final Sample Size: Number of Clusters (Unit of Randomization)
Was attrition correlated with treatment status?
Final Sample Size: Total Number of Observations
Final Sample Size (or Number of Clusters) by Treatment Arms
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials