Social Norm and Dietary Restriction for Young Women

Last registered on November 18, 2023
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Pre-Trial

Trial Information

General Information

Title
Social Norm and Dietary Restriction for Young Women
RCT ID
AEARCTR-0012485
Initial registration date
November 13, 2023

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
November 18, 2023, 6:16 PM EST

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

Locations

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Primary Investigator

Name
Yumi Ishikawa
Affiliation
Kobe University
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Other Primary Investigator(s)

PI Name
Youngrok Kim
PI Affiliation
University of Hyogo
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PI Name
Mao Nakayama
PI Affiliation
Japan Women's University
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PI Name
Ryo Sakamoto
PI Affiliation
Osaka University
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PI Name
Yanni Shen
PI Affiliation
Osaka University
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Additional Trial Information

Status
In development
Start date
2023-11-20
End date
2025-03-31
Keywords
Behavior, Health
Additional Keywords
Social Norm, Dietary Restriction
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
Underweight is a serious health issue among young Japanese women. It has a serious impact on their own health and the health of future generations. One of the causes of underweight among Japanese women is dietary restriction due to the social norm that 'women should be thin'. This study examines whether correcting the expectation of these social norm will reduce women’s willingness to be thin and excessive dietary restriction.
External Link(s)

Registration Citation

Citation
Ishikawa, Yumi et al. 2023. "Social Norm and Dietary Restriction for Young Women." AEA RCT Registry. November 18. https://doi.org/10.1257/rct.12485-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2023-11-20
Intervention End Date
2023-12-31

Primary Outcomes

Primary Outcomes (end points)
Willingness to be thin, Dietary restriction
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We conduct online laboratory experiments and randomly inform women about the actual social norm of dietary restriction among women.
Experimental Design Details
Not available
Randomization Method
Randomization will be done in office by a computer.
Randomization Unit
individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
N/A
Sample size: planned number of observations
270 individuals
Sample size (or number of clusters) by treatment arms
90 individuals control, 90 individuals normative expectations, 90 individuals empirical expectations
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Institutional Review Board, Research Institute for Economics and Business Administration, Kobe University
IRB Approval Date
2023-10-05
IRB Approval Number
KOBE_RIEB_IRB002
IRB Name
IRB, Research Institute for Socionetwork Strategies, Kansai University
IRB Approval Date
2023-10-16
IRB Approval Number
2023021
Analysis Plan