The well-documented 'no significant difference' phenomenon (NSD) is the observation that the delivery mode does not impact learning outcomes. The proposition tested in this paper (22 page PDF) is the idea that while NSD may hold in the aggregate, it varies at the individual level. It looks at literature suggesting differences in things like course decisions, aptitudes, and learning styles might result in differences in outcome. The authors model these differences for about 500 students to preduct whether they would result in differences in outcomes and find 'jumpers' - people whose grade would have changed by one letter grade or more. Good paper, detailed and well-written.
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