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TABLE 1  A Glossary of Cognitive Terms in Special Operations
              Term                                                  Description
              Cognitive         All aspects of mental activity that could impact human performance. The broad term “cognitive” could refer to
                                individual skills, such as memory or attention, although any intervention will ultimately be intended to produce
                                enhanced mental performance.
              Cognitive Domain  Preservation of the Force and Family (POTFF) is a Special Operations support organization dedicated to optimizing
                                and sustaining mission readiness, longevity, and performance among Operators. The organization recently stood up
                                a unique component, the Cognitive Domain, dedicated to enhanced cognitive performance.
              Cognitive enhancement  An individual employed to conduct cognitive enhancement activities. This person will generally have advanced
              practitioner      training, such as a doctoral degree, and will be capable of program development as well as overseeing interventions.
              Cognitive performance  Similar to a cognitive enhancement practitioner, this person is also employed to conduct cognitive enhancement
              specialist        activities. Education requirements generally only include a master’s degree, and the position involves more direct
                                interaction with Operators with fewer expectations of program development.
              Ceiling effect    A scenario in which the majority of results for a given assessment approach the maximum value for the scale used.
              Floor effect      A scenario in which the majority of results for a given assessment approach the minimum value for the scale used.
              Drift diffusion   A model of cognitive processes in two-choice decisions that identifies multiple subcomponents of decision-making
              modeling          processes, such as information processing speed, decision bias, and the threshold of information needed to reach a
                                decision.
              Commission error  A type of error in which the individual performs an incorrect action. Commission errors are commonly referenced
                                during inhibitory control assessments, in which the participant should not make a response to a stop or no-go signal
                                but responds anyway.

              Metrics (ANAM).  This assessment measures multiple cogni-  and cognitive impairment among Alzheimer’s disease patients.
                            2–5
              tive functions through tasks such as simple reaction time and   Ceiling effects are expected, as anything below a score of 26
              go/no-go. Moreover, the test is mandated by military policy as   is considered impaired with a maximum score of 30. A perfect
              the primary neurocognitive assessment tool (DoDI 6490.13),    score does not indicate optimal cognitive performance, merely
              and yet, the purpose for such a mandate primarily involved   the absence of dementia or severe cognitive impairments. This
              assessing cognitive impairment following traumatic brain in-  test can be exceptional when used within its intended param-
              jury.  The test has been used previously to this effect, even in a   eters, whereas considering a perfect MoCA score as optimized
                 6
              combat zone, and the ANAM has normative data for a Special   cognitive function within Special Operations would be asinine.

              Operations population. 7–10  Normative in this sense describes a   Such application would be a failure on behalf of the practi-
              large dataset available for reference that will allow for a con-  tioner, not  the test.  These  combined  examples demonstrate
              trast between individual scores and expected scores among a   how a forcing function defines the need or purpose of some
              given population.                                  given cognitive assessment, and yet not all available tests can
                                                                 be applied to maximum impact for a given forcing function.
              On paper, it should be the ideal assessment to measure cog-
              nitive functioning, but can the test measure optimal cogni-  For Special Operations cognitive assessments, the purpose is
              tive performance? These previous uses can establish whether   multi-faceted, but not without definition. Specifically, Special
              cognitive  function  remains impaired  after  a  blast exposure,   Operations have three core needs in cognitive assessment: (1)
              although linking the assessment to optimal decision-making   operational relevance; (2) optimization; and (3) speed. Each
              and enhanced human performance becomes  more difficult.   facet will be discussed in turn.
              Stimuli do not resemble anything operationally relevant, and
              the decisions involve no tactical component. While there are   Despite the obvious need for the first requirement—opera-
              established criteria for identifying decline, there are no criteria   tional relevance—the connection is often more difficult to
              to identify an optimal state. The test proceeds largely under   make than one would imagine. Cognitive tests often utilize
              the tautology that better performance indicates better cogni-  rather bland stimuli such as simple polygons or numbers to
              tive function. Questions remain about which subtest is most   control for tangential factors that could influence outcomes.
              relevant to military operations, and there is an additional as-  For example, introducing complex stimuli such as logos could
              sumption to be made regarding operational connection. For   influence response times based upon individual familiarity
              example, a trigger press is essentially a motor function, and   with particular symbols. Because the goal is often to interpret
              so simple reaction time should be akin to how quickly an Op-  cognitive processes through psychophysical measurement and
              erator can initiate a trigger press in a combat situation. This   response times, there is an inherent disconnect between the
              link remains an assumption, however, unless the action can be   measurement and what it is intended to represent. This mea-
              placed into the proper context, such as reaction time during a   surement error can be exacerbated in military research unless
              shooting simulation.                               certain mathematical principles are employed to ensure effect
                                                                 sizes and other outcomes can be appropriately conveyed to a
              This example indicates how the ANAM may lose some of its   military audience. 14,15  The solution is to ensure that the cogni-
              potential efficacy as a cognitive assessment when applied to   tive test itself represents something with operational relevance
              optimization rather than recovery from traumatic brain injury.   or that outcomes are presented in operationally relevant terms.
              Another example can further illustrate the point through the
              Montreal Cognitive Assessment (MoCA). 11–13  The MoCA has   For example, does the go/no-go task have an operationally
              been  well-validated,  widely  used, and  literally  has cognitive   relevant application? The primary purpose of these tasks is
              assessment in the title—but can it be used for Special Oper-  to measure response inhibition. Go/no-go tasks measure auto-
              ations?  This assessment  is oriented  to identifying  dementia   matic inhibition through stimulus identification, whereas stop

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