The effects of online cognitive training on job search behavior and skills among university students in Ukraine

Last registered on April 01, 2026

Pre-Trial

Trial Information

General Information

Title
The effects of online cognitive training on job search behavior and skills among university students in Ukraine
RCT ID
AEARCTR-0018228
Initial registration date
March 29, 2026

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
April 01, 2026, 10:28 AM EDT

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

Locations

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Primary Investigator

Affiliation
University of Lausanne

Other Primary Investigator(s)

PI Affiliation
University of Lausanne
PI Affiliation
University of Lausanne
PI Affiliation
Kyiv National Economic University named after Vadym Hetman
PI Affiliation
Kyiv National Economic University named after Vadym Hetman
PI Affiliation
Kyiv National Economic University named after Vadym Hetman
PI Affiliation
Kyiv National Economic University named after Vadym Hetman

Additional Trial Information

Status
In development
Start date
2026-03-30
End date
2027-02-28
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This project evaluates the effects of online cognitive training on labor market-related behaviors and outcomes and cognitive skills among university students in Ukraine. We implement a randomized controlled trial in which students are assigned to treatment at the cohort level, defined as university x study field x study year.

All participants register on the J4UA job search platform, complete a baseline survey that includes a skill assessment and have access to the J4UA job search engine. The job search engine shows the vacancies of the search job and the vacancies to nine recommended occupations. Cohorts assigned to the treatment group receive invitations to complete online cognitive training sessions over a four-week period. Outcomes are measured at midline and endline and in a follow-up survey.
External Link(s)

Registration Citation

Citation
Bächli, Mirjam et al. 2026. "The effects of online cognitive training on job search behavior and skills among university students in Ukraine." AEA RCT Registry. April 01. https://doi.org/10.1257/rct.18228-1.0
Experimental Details

Interventions

Intervention(s)
The study includes a single treatment arm. Treated participants are invited twice per week to complete online cognitive training sessions of approximately 30–45 minutes each. The training is designed to target the cognitive domains measured in the baseline assessment. The intervention lasts four weeks and consists of eight sessions in total. Completion of the cognitive training is voluntary.
Intervention Start Date
2026-03-30
Intervention End Date
2027-02-28

Primary Outcomes

Primary Outcomes (end points)
Labor market outcomes and aspirations (i.e., employment status, (expected) labor earnings), job search behavior (i.e., search activity, job search motivation)
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Engagement on the J4UA platform (i.e., interaction with and clicks on specific features), academic behaviors (i.e., academic performance, study effort), cognitive dimensions targeted by the intervention as well as measures of well-being and life satisfaction
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We recruit students enrolled at universities in Ukraine to participate in an online randomized controlled experiment. Recruitment is conducted at the university level over several weeks, with universities invited to disseminate the study invitation to their students. Participation in the study is voluntary.

Randomization is conducted at the cohort level, defined by university × study field × study year. When the first student from a given cohort registers on the J4UA platform, the cohort is assigned to either the treatment or control group with probability 0.5. All subsequent participants of the same cohort are assigned to the same group as the first registrant. To maintain balance within study fields, each new cohort is assigned to the underrepresented group within a given study field. If the two groups are balanced within study field at the time a cohort registers, then the cohort is randomized with probability 0.5 into treatment or control.

All participants are required to register on the Jobs for You in Ukraine job search platform (J4UA) and complete the baseline questionnaire, which includes a skill assessment. J4UA offers a job search engine that displays ten recommended occupations along with corresponding vacancies. The intervention lasts four weeks.

All participants are invited to complete surveys at midline, endline and follow-up.
Experimental Design Details
Not available
Randomization Method
When the first student from a given cluster registers on the J4UA platform, the cohort is assigned to either the treatment or control group with probability 0.5. All subsequent participants of the same cohort are assigned to the same group as the first registrant. To maintain balance within study fields, each new cohort is assigned to the underrepresented group within a given study field. If the two groups are balanced within study field at the time a cohort registers, then cohort is randomized with probability 0.5 into treatment or control.

If individuals who are not students register on the J4UA platform, they are randomized individually to the treatment or control group with probability p = 0.5.
Randomization Unit
The randomization unit is a cluster, defined as the university x study field x study year. If individuals who are not students register, they are randomized individually to the treatment or control group.
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
We plan to have 280 clusters with an average of five participants per cluster and assuming a rho of 0.1 where the rho is the intra-cohort correlation.
Sample size: planned number of observations
We plan to have 1,400 enrolled students.
Sample size (or number of clusters) by treatment arms
We plan to have 140 clusters for the control group and 140 clusters for the treatment group.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
CER-HEC - Ethical Committee, HEC Lausanne, UNIL
IRB Approval Date
2024-09-24
IRB Approval Number
N/A