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Retricted access

Research article

First published 2009-12

Unbiased Causal Inference From an Observational Study: Results of a Within-Study Comparison

Steffi Pohl, Peter M. Steiner, Jens Eisermann [...]

Educational Evaluation and Policy Analysis

Open access

Research article

First published 2025-3-31

Study within a trial 119: The effectiveness of a thank you card to improve trial follow up;a randomised study within a trial

Catherine Arundel, Charlie Welch, Puvanendran Tharmanathan [...]

Research Methods in Medicine & Health Sciences

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Research article

First published 2016-6

Assessing the Accuracy of Generalized Inferences From Comparison Group Studies Using a Within-Study Comparison Approach

Andrew P. Jaciw

Evaluation Review

Free access

Research article

First published 2022-7

A new opportunity for enhancing trial efficiency: Can we investigate intervention implementation processes within trials using SWAT (study within a trial) methodology?

Sadia Ahmed, Jennifer Airlie, Andrew Clegg [...]

Research Methods in Medicine & Health Sciences

Open access

Research article

First published 2023-1

Challenges and solutions to the implementation of studies within a trial: The experiences of the PROMETHEUS programme

Catherine E Arundel, Laura Clark, Elizabeth Coleman [...]

Research Methods in Medicine & Health Sciences

Retricted access

Research article

First published 2018-4

Assessing Correspondence Between Experimental and Nonexperimental Estimates in Within-Study Comparisons

Peter M. Steiner, Vivian C. Wong

Evaluation Review

Free access

Research article

First published 2025

Pre-notification of trial participants to improve response rates retention (SWAT 28);a study within a trial (SWAT) embedded in PROFHER-2

Elizabeth Coleman, Luke Strachan, Catherine Arundel [...]

Research Methods in Medicine & Health Sciences

Retricted access

Research article

First published 2017-4

Comparing Between- and Within-Group Variances in a Two-Level Study

Tenko Raykov, George A. Marcoulides, Hope O. Akaeze

Educational and Psychological Measurement

Retricted access

Research article

First published 2016-6

Applications of a Within-Study Comparison Approach for Evaluating Bias in Generalized Causal Inferences From Comparison Groups Studies

Andrew P. Jaciw

Evaluation Review

Open access

Research article

First published 2023-3

A qualitative investigation of reasoning behind decisions to decline participation in a research intervention: A study-within-a-trial

Christopher P Dwyer, Anusha Moses, Fionnuala M Rogers [...]

Journal of Health Psychology

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