Authors: Rebecca Allen, John Jerrim, Meenakshi Parameshwaran, Dave Thompson

EEF Research Paper Series, No. 001, February 2018

EEF response: This study analyses some of the properties of major commercial assessments used by the EEF in large trials. We have used the results of this study to update some of the assumptions fed into sample size calculations and inform the choice of appropriate and cost-effective commercial assessments to be used as pre-tests.