Poverty and Cognitive Function
Last registered on July 27, 2015

Pre-Trial

Trial Information
General Information
Title
Poverty and Cognitive Function
RCT ID
AEARCTR-0000790
Initial registration date
July 27, 2015
Last updated
July 27, 2015 1:50 PM EDT
Location(s)
Region
Primary Investigator
Affiliation
Princeton University
Other Primary Investigator(s)
PI Affiliation
Princeton University
Additional Trial Information
Status
On going
Start date
2015-06-29
End date
2015-09-01
Secondary IDs
Abstract

This document describes the analysis plan for a randomized experiment examining the psychological effect of poverty on cognitive function. We will recruit 260 respondents from informal settlements in Nairobi, Kenya, and ex- pose them to either a poverty prime or a control prime in the lab. We then measure cognitive performance using Raven’s Progressive Matrices and a spa- tial compatibility task. The design of the study is a close replication of Mani et al. (2013). This plan outlines the design of the study, the outcomes of interest, and the econometric approach.
External Link(s)
Registration Citation
Citation
Abraham, Justin and Johannes Haushofer. 2015. "Poverty and Cognitive Function." AEA RCT Registry. July 27. https://www.socialscienceregistry.org/trials/790/history/4865
Experimental Details
Interventions
Intervention(s)
Our study utilizes the methodology developed by Mani et al. (2013) adapted to our Kenyan sample, to identify the psychological e↵ect of poverty primes on cognitive function in the lab. We present three hypothetical scenarios to respondents, each of which describes a financial problem respondents might experience. The primes are described in detail in Appendix A. Respondents are given 5 minutes per scenario to contemplate about how they might deal with these problems. The aim of exposure to these scenarios is to trigger thoughts of the respondents’ economic situation.
We identify the e↵ect of interest by manipulating the financial stakes involved in each of the hypothetical scenarios. For example, where respondents incur an unexpected cost of KES 50 in an “easy” scenario, the cost is KES 500 in a “di
Intervention Start Date
2015-06-29
Intervention End Date
2015-07-31
Primary Outcomes
Primary Outcomes (end points)
1. Poverty primes (randomly assigned treatment)
2. Cantril Self-Anchoring Ladder
(a) Current life
(b) Life 5 years from now
3. Financial Worry Questionnaire 4. Raven’s Progressive Matrices
(a) Comprehension (b) Scored task
5. Spatial Incompatibility Task
(a) Comprehension (b) Scored task
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We will conduct a series of laboratory sessions with an expected mean of 20 respondents per session, until we reach 260 respondents. At the beginning of each session, respondents will be randomly assigned to treatment and control groups, and will be administered the treatment or control prime according to treatment assign- ment. Immediately following the priming, respondents will complete the Cantril

Self-Anchoring Scale and a questionnaire about financial worry, followed by Raven’s Progressive Matrices and the spatial compatibility task. The treatments, tasks, and questionnaires were administered using touch screen computers to enable illiterate and computer-illiterate respondents to participate. Project staff read instructions to the respondents in English and Swahili to maximize comprehension. Respondents received a base compensation of KES 200 for participating in the experiment, plus any money earned as a result of paid tasks. The compensation and bonus were transferred to the respondents via M-Pesa after the experiment.
Experimental Design Details
Randomization Method
Computer randomization
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
18 lab sessions
Sample size: planned number of observations
260
Sample size (or number of clusters) by treatment arms
130 control, 130 treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Princeton University Institutional Review Board
IRB Approval Date
2014-12-22
IRB Approval Number
0000006799
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