Without the benefit of random assignment, we used a
variety of statistical approaches to determine the program's impact on student achievement immediately after its launch.
Their research documented an
array of statistical approaches that can be used to analyze assessment data and discussed the benefits and limitations of each model.
Professor Ian Jacobs, currently President of The University of New South Wales, Australia, the chief investigator of UKCTOCS and
co-inventor of the statistical approach, who conceived the trial, says: