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The Dissemination of Motivated Beliefs
Last registered on November 12, 2019

Pre-Trial

Trial Information
General Information
Title
The Dissemination of Motivated Beliefs
RCT ID
AEARCTR-0005021
Initial registration date
November 12, 2019
Last updated
November 12, 2019 11:28 AM EST
Location(s)

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Primary Investigator
Affiliation
Frankfurt School
Other Primary Investigator(s)
PI Affiliation
Goethe University Frankfurt
PI Affiliation
Goethe University Frankfurt
PI Affiliation
Goethe University Frankfurt
Additional Trial Information
Status
In development
Start date
2019-11-13
End date
2020-01-31
Secondary IDs
Abstract
There is a growing literature that studies the determinants and impact of motivated beliefs (Di Tella et al., 2015; Zimmermann, 2019). What is, however, hardly understood at all is how human interaction in general, and communication via social media in particular, affect the formation of such beliefs. We conduct a laboratory experiment to analyze this question.
External Link(s)
Registration Citation
Citation
Grunewald, Andreas et al. 2019. "The Dissemination of Motivated Beliefs." AEA RCT Registry. November 12. https://doi.org/10.1257/rct.5021-1.0.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2019-11-13
Intervention End Date
2020-01-31
Primary Outcomes
Primary Outcomes (end points)
In our empirical analysis, we will focus on testing how communication affects the formation of motivated beliefs.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Our study features a between subject design and four treatments. The baseline treatments are identical to the modified game in Di Tella et al. (2015). In our new treatments, we keep the setting the same except for the fact that we allow for communication between subjects via a chat.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
groups of two individuals
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
approximately 270 groups each of which consists of 2 subjects.
Sample size: planned number of observations
540 subjects
Sample size (or number of clusters) by treatment arms
140 subjects per treatment.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Goethe University Frankfurt
IRB Approval Date
2019-11-12
IRB Approval Number
N/A
Analysis Plan

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