In collaboration with professors Armin Falk and Pia Pinger at the University of Bonn, Kosse has now reanalyzed the data reported in the replication study. The result actually points in the same direction as the study by Mischel and colleagues, but the effect itself is somewhat less pronounced." In our view, the interpretation of the new data overshoots the mark. In fact it demonstrates that the marshmallow test retains its predictive power when the statistical sample is more diverse and, unlike the original work, includes children of parents who do not have university degrees. "The replication study essentially confirms the outcome of the original study. Now, a team led by Fabian Kosse, professor of applied economics at LMU, has reassessed the data on which this interpretation is based, and the new analysis contradicts the authors' conclusions. The report produced quite a stir in the media, as its conclusions appeared to be in conflict with those reached by Mischel. In 2018, the results of a new study designed to replicate Mischel's experiment appeared in the journal Psychological Science. The Mischel experiment has since become an established tool in the developmental psychologist's repertoire. The results showed that the longer his 4- and 5-year-olds were able to resist the temptation presented by the first marshmallow, the better they performed in subsequent tests of educational attainment. By its very nature, Mischel's test is a prospective experiment, and he followed his experimental subjects over several decades.
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