x

We are happy to announce that all trial registrations will now be issued DOIs (digital object identifiers). For more information, see here.
Study Supporter Pilot
Last registered on April 02, 2014

Pre-Trial

Trial Information
General Information
Title
Study Supporter Pilot
RCT ID
AEARCTR-0000336
Initial registration date
April 02, 2014
Last updated
April 02, 2014 1:56 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
Harvard Kennedy School
Other Primary Investigator(s)
PI Affiliation
Harvard Business School
Additional Trial Information
Status
Completed
Start date
2013-12-09
End date
2014-03-17
Secondary IDs
Abstract
We are interested in how mobilizing social support for students in MOOCs can affect student completion rates.
External Link(s)
Registration Citation
Citation
Frey, Erin and Todd Rogers. 2014. "Study Supporter Pilot." AEA RCT Registry. April 02. https://doi.org/10.1257/rct.336-1.0.
Former Citation
Frey, Erin and Todd Rogers. 2014. "Study Supporter Pilot." AEA RCT Registry. April 02. https://www.socialscienceregistry.org/trials/336/history/1479.
Experimental Details
Interventions
Intervention(s)
Students are recruited to participate in the study and asked to identify a Study Supporter. They are told that this “Supporter” may be contacted throughout the course and asked to inquire about the course and to encourage you. They are then randomly assigned to one of two conditions:
- Supporter condition
- Control condition
Intervention Start Date
2013-12-09
Intervention End Date
2014-03-17
Primary Outcomes
Primary Outcomes (end points)
Credit earning and course grade
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Randomly assigned to one of two conditions
Experimental Design Details
Randomization Method
randomization done by computer
Randomization Unit
Individual students
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
We aimed for 1200 students, we did get ~700 students
Sample size: planned number of observations
~700 students
Sample size (or number of clusters) by treatment arms
We aimed for ~600 students per condition. We did get ~350 per condition
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
We will have 80% power to detect effects of 9 percentage point increase in course credit earning, assuming 60% of control group earns course credit, using alpha of 5%. This does not account for possible precision gains from the covariates we intend to include (age, gender, and education level).
Supporting Documents and Materials

There are documents in this trial unavailable to the public. Use the button below to request access to this information.

Request Information
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Harvard IRB
IRB Approval Date
2013-11-14
IRB Approval Number
23890
Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
No
Is data collection complete?
Data Publication
Data Publication
Is public data available?
No
Program Files
Program Files
Reports and Papers
Preliminary Reports
Relevant Papers