Cognitive science has been a dynamic area of research over the past fifteen
years, producing breakthroughs in our basic understanding of the brain
and behavior. Although this research has identified key processes of attention,
memory, and high-order problem solving, it has yet to be applied systematically
to the field of health science.
I am in the process of developing a laboratory that will
provide measures of basic information processes (encoding, attention,
working memory, vigilance) known to be sensitive to individual's health
and physical fitness. The laboratory will be designed specifically to
assess the impact of a wide variety of interventions (e.g., exercise,
nutrition, drugs, rehabiliation) on cognitive processes that serve as
the building blocks of intellectual functioning. The selection of cognitive
tasks that will be employed are based on Workload Theory, which provides
a framework for bridging the gap between cognitive psychology and neuropsychology.
Workload Theory is based upon and incorporates themes that have long histories
in psychological research. It assumes that people consciously attempt
to optimize their performance by controlling and regulating the status
of their physical and mental states. Further, the cognitive control of
these states can be understood in terms of cybernetic principles, which
describe how individuals reduce discrepancies that exist between the psychophysiological
state they expect to experience and the actual state they are experiencing.
The restoration and regulation of a desired state requires
the allocation of physical and mental resources, both of which are assumed
to be finite. State regulation is controlled cognitively via three routes:
computational processes, emotional processes, and mental effort. Cognitive
control that is exerted via computation uses the structures and functions
of the information-processing system. The human brain is conceptualized
to function analogous to a computer. Information flowing from sensory
systems is perceived, stored, and manipulated according to formal and
logical rules. Cognitive control that is exerted via emotion does not
follow formal rules of logic or reason.
The limbic system, which is comprised of phylogenetically
older brain structures than the neocortex, initiate automatic regulatory
responses by way of structures of the autonomic nervous system. Discrepant
environmental conditions lead to changes in physiological arousal (e.g.,
heart rate, respiration, etc), which are linked to subjective feelings
(e.g., anxiety and fear). Cognitive control that is exerted via mental
effort reflects conative, goal-oriented motivation that expresses itself
in terms of trying harder (e.g., concentration and attentional focus)
and the willingness to expend physical and mental resources. |
| Research Keywords: cognitive psychology, skill
acquisition, cognitive aging, exercise, Individual differences, developmental
disabilities, human factor, basic research, psychopharmacology, mental
retardation |