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Measuring germane load requires correlation with learning

Editor – We read with great interest the article by Sewell and colleagues regarding the development of the CLIC selfreport instrument for measuring learners’ cognitive load during colonoscopy training. We have previously documented poor validity evidence for cognitive load measures and commend the authors for their rigorous methodology and large sample size. The authors used factor analysis to support their argument that CLIC is able to distinguish the three components of cognitive load: intrinsic, extraneous and germane. Given the debate around the theoretical underpinnings of germane load, we contend that a higher standard of validity evidence is needed to support this conclusion.