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but they vary in value for different steps. In a yin-yang balance,   Author Contributions
              a tradeoff between thinking and speed occurred in this study,   JFK, JKA, and MAD conceived and designed the study; JFK
              and user 3, a cadet, balanced it best. This surprising finding   resourced, managed, and oversaw the study; JFK, NJN, and
              of user judgment reinforces a principle: Caregiving engines are   ART collected data; and JFK, JKA, NJN, and ART analyzed
              human, and caregiving analyses have to account for that fact.  data; all participated in writing. All authors approved the final
                                                                 version of the manuscript.
              Preference as an aspect of performance is a tricky, evolving
              science, 18,19  and there is little awareness of its subtleties in the   References
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              Funding                                               paring Generation 6 versus prototype Generation 7 Combat Ap-
                                                                                  ®
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              The opinions or assertions contained herein are the private   17.  Goolsby C, Jacobs L, Hunt RC, et al. Education program content
              views of the authors and are not to be construed as official   and delivery recommendations. J Trauma Acute Care Surg. 2018;
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              Disclosure                                            skill to control groin-wound bleeding: use of junctional tourni-
              The authors have indicated they have no financial relation-  quet models on a manikin. J Spec Oper Med. 2017;17(2):39–48.
              ships relevant to this article to disclose.

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