dc.date.accessioned | 2022-12-20T16:07:06Z | |
dc.date.available | 2022-12-20T16:07:06Z | |
dc.date.created | 2022-11-24T10:25:11Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Lycurgus, Timothy Hansen, Ben White, Mark Christopher . Conjuring Power from a Theory of Change: The PWRD Method for Trials with Anticipated Variation in Effects. Journal of Research on Educational Effectiveness. 2022 | |
dc.identifier.uri | http://hdl.handle.net/10852/98224 | |
dc.description.abstract | We present an aggregation scheme that increases power in randomized controlled trials and quasi-experiments when the intervention possesses a robust and well-articulated theory of change. Intervention studies using longitudinal data often include multiple observations on individuals, some of which may be more likely to manifest a treatment effect than others. An intervention’s theory of change provides guidance as to which of those observations are best situated to exhibit that treatment effect. Our power-maximizing weighting for repeated-measurements with delayed-effects scheme, PWRD aggregation, converts the theory of change into a test statistic with improved asymptotic relative efficiency, delivering tests with greater statistical power. We illustrate this method on an IES-funded cluster randomized trial testing the efficacy of a reading intervention designed to assist early elementary students at risk of falling behind their peers. The salient theory of change holds program benefits to be delayed and non-uniform, experienced after a student’s performance stalls. In this instance, the PWRD technique’s effect on power is found to be comparable to that of doubling the number of clusters in the experiment. | |
dc.language | EN | |
dc.title | Conjuring Power from a Theory of Change: The PWRD Method for Trials with Anticipated Variation in Effects | |
dc.title.alternative | ENEngelskEnglishConjuring Power from a Theory of Change: The PWRD Method for Trials with Anticipated Variation in Effects | |
dc.type | Journal article | |
dc.creator.author | Lycurgus, Timothy | |
dc.creator.author | Hansen, Ben | |
dc.creator.author | White, Mark Christopher | |
cristin.unitcode | 185,18,2,0 | |
cristin.unitname | Institutt for lærerutdanning | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 2079805 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Research on Educational Effectiveness&rft.volume=&rft.spage=&rft.date=2022 | |
dc.identifier.jtitle | Journal of Research on Educational Effectiveness | |
dc.identifier.startpage | 1 | |
dc.identifier.endpage | 27 | |
dc.identifier.doi | https://doi.org/10.1080/19345747.2022.2142178 | |
dc.type.document | Tidsskriftartikkel | |
dc.source.issn | 1934-5747 | |
dc.type.version | SubmittedVersion | |