In the paper, linked below, Roediger and Butler state that "[c]onventional wisdom and studies in behavioral psychology indicate that providing feedback immediately after a test is best. However, experimental results show that delayed feedback might be even more powerful" (23). They then show the results from an experiment where students who received immediate feedback after each question had better recall one week later than students who received the correct answers only after the entire exam was completed. They hypothesize that "[t]he benefits of delayed feedback might represent a type of spacing effect: the phenomenon whereby two presentations of material given with spacing between them generally leads to better retention than massed (back-to-back) presentations."
http://psych.wustl.edu/memory/Roddy%20article%20PDF's/Roediger%20&%20Butler%20(2011)_TCS.pdf
Of course we don't know if the same results would occur in group environments. Since most of us only use immediate feedback in the team readiness assessments, that would be a useful thing to know.
Michael Kramer
Department of History and Philosophy
York College (CUNY)
94-20 Guy R. Brewer Blvd.
Jamaica, NY 11451
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