The effects of induced emotions on willingness to contribute

Last registered on January 30, 2023


Trial Information

General Information

The effects of induced emotions on willingness to contribute
Initial registration date
January 26, 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
January 30, 2023, 6:01 AM EST

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


Primary Investigator

University of Exeter

Other Primary Investigator(s)

PI Affiliation
University of Exeter
PI Affiliation
University of Exeter

Additional Trial Information

Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Previous experimental findings suggest that positive emotions promote productivity in a numeric task. While in the real world, the gender stereotype effect has been found to decrease team performance to some extent. Based on prior works, we ask whether induced emotions affect the participant's willingness to answer for the group in different gender types. We are especially interested in two induced emotions, fear, and pleasure.
External Link(s)

Registration Citation

Fornwagner, Helena, Brit Grosskopf and yangfei lin. 2023. "The effects of induced emotions on willingness to contribute." AEA RCT Registry. January 30.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
After watching the videos, participants will be asked to answer questions in different gender categories and decide their willingness to answer for their groups. We assume that induced emotions will affect participants' willingness to contribute to their groups (Pleasure - more willing to contribute; Fear - less willing to contribute).
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
This is a between-subject experiment. The experiment contains several parts: the belief elicitation, the test of individual abilities, the elicitation of willingness to contribute, and the risk preferences part. The treatments that are the inductions of emotions will be introduced before the belief elicitation stage.
Experimental Design Details
Randomization Method
By a computer
Randomization Unit
individual randomization for treatments
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
One hundred fifty groups, two participants in a group.
Sample size: planned number of observations
300 students
Sample size (or number of clusters) by treatment arms
50 groups control, 50 groups fear treatment, 50 groups pleasure treatment.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
For one treatment group, we need 96 participants (95\% confidence level, 10\% precision level, and the maximum variation level (p=0.5, q=1-p)). Therefore we plan to recruit 300 participants in total.

Institutional Review Boards (IRBs)

IRB Name
FESE UEBS Ethics Committee
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials