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Durham University

School of Education

Research Projects

Standard Deviation as an Outcome of Interventions: A Methodological Intervention, Education Endowment Foundation

A research project of the School of Education.

Background

Interventions generally focus on the mean impact, but the impact of the spread of scores is also important.

Funding

The project is funded by the following grant.

  • Standard Deviation As An Outcome Of Interventions: A Methodological Intervention (£3602.00 from Education Endowment Foundation)

Aims

To establish updated procedure for measuring the change of SD

Methods

Theoretical, statistical

Findings

The report
It recommends the simple recording of percentage change in SD in the first instance, together with 95% Confidence Intervals. For meta-analyses it recommends the use of the log of the ratio of variances which is a metric with the suitable properties.

Staff

From the School of Education

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