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Effects of Trier Social Stress Test on Affect, Heart Rate and Beliefs: Pre-Analysis Plan
Last registered on March 06, 2017

Pre-Trial

Trial Information
General Information
Title
Effects of Trier Social Stress Test on Affect, Heart Rate and Beliefs: Pre-Analysis Plan
RCT ID
AEARCTR-0002071
Initial registration date
March 03, 2017
Last updated
March 06, 2017 9:05 AM EST
Location(s)
Region
Primary Investigator
Affiliation
Loyola Marymount University
Other Primary Investigator(s)
PI Affiliation
Princeton University
Additional Trial Information
Status
Completed
Start date
2016-11-16
End date
2017-03-01
Secondary IDs
Abstract
This document describes the analysis plan for a randomized laboratory experiment examining the effects of the Trier Social Stress Test (TSST) on psychological and physiological states. Our study expects to include 60 subjects from the informal settlements in Nairobi, Kenya. Respondents are randomly assigned to either a treatment or control condition of the TSST, for either one single day or seven consecutive days. This plan outlines the design of the study, the outcomes of interest, and the econometric approach.
External Link(s)
Registration Citation
Citation
Haushofer, Johannes and Prachi Jain. 2017. "Effects of Trier Social Stress Test on Affect, Heart Rate and Beliefs: Pre-Analysis Plan." AEA RCT Registry. March 06. https://doi.org/10.1257/rct.2071-1.0.
Former Citation
Haushofer, Johannes and Prachi Jain. 2017. "Effects of Trier Social Stress Test on Affect, Heart Rate and Beliefs: Pre-Analysis Plan." AEA RCT Registry. March 06. https://www.socialscienceregistry.org/trials/2071/history/14682.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2016-11-16
Intervention End Date
2017-02-22
Primary Outcomes
Primary Outcomes (end points)
Salivary cortisol, responses on PANAS questionnaire, guess of performance, heart rate and heart rate variability
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Treatment:
We use a 2 x 2 design in which participants are randomized into either a stress or a control condition, and into either an acute or a chronic condition. The TSST is designed to induce stress using two socially evaluative situations – a speech task and a mental arithmetic task. The acute condition consists of completing the TSST or a control task on a single day (Day 1); the chronic condition consists of completing the TSST or a control task for 7 consecutive days.

Data Collection:
We conducted laboratory sessions with 4 respondents per session, until we reached 60 respondents. Participants were randomly assigned to one of four conditions – either the control or treatment group, for either one or seven consecutive days.
Experimental Design Details
Randomization Method
Alternating treatments by week, randomized invitations to sessions
Randomization Unit
Experimental session
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
15
Sample size: planned number of observations
60
Sample size (or number of clusters) by treatment arms
15 treated acute, 15 treated chronic, 15 control acute, 15 control chronic
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Princeton Institutional Review Board
IRB Approval Date
2015-10-21
IRB Approval Number
7367
Analysis Plan
Analysis Plan Documents
TsstPAP_2017.03.03.pdf

MD5: d39badab2def546241be270ffb266979

SHA1: 1959672a6b9e274cbde8beeac5929806c4711504

Uploaded At: March 03, 2017

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