Lawrence G. Shattuck

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are examples of distributed supervisory control systems. Distributed supervisory control systems are hierarchical and cooperative. They include remote supervisors who work through intelligent local actors to control some process. With this framework, human supervisors, designers, and procedure writers can all be viewed as remote supervisors who provide(More)
STUDY OBJECTIVES The study provided an opportunity to observe sleep patterns in a college-age population attending the United States Military Academy. DESIGN This 4-year longitudinal study investigated sleep patterns of cadets. A stratified sample of 80 cadets had sleep patterns monitored using actigraphy for 8 months: one month in both fall and spring(More)
STUDY OBJECTIVE This study evaluated the effect of accommodating adolescent sleep-wake patterns by altering the timing of the major sleep period of US Army recruits. DESIGN The quasi-experimental study compared recruits assigned to one of two training companies: one with a customary sleep regimen (20:30 to 04:30) while the other employed a phase-delayed(More)
A unique mission of the U.S. Marine Corps is the amphibious assault landing. These missions require transportation by small watercraft, exposing Marines to waterborne motion before landing. The timeliness and accuracy of their decisions once the Marines debark may well determine the outcome of an entire operation. This study assesses how warfighters'(More)
Complex systems will, inevitably, experience failures. The cause of these failures or mishaps may be labeled 'operator error,' but often they are actually caused by the confluence of technological, situational, individual, and organizational factors. Several models and theories of human error have been proposed over the years and are reviewed in this paper.(More)
Technologists and human factors practitioners tend to approach the measurement of situation awareness from different perspectives. Technologists compare the difference between the data available in the environment with what has been detected by the sensors built into a system. Human factors practitioners focus on perception and cognition to the exclusion of(More)
The goal of this study was to examine the effects of sleep on both the cognitive and physiological performance of warfighters approximately two hours after wakeup. Participants were active duty Unites States Marines (N=61). Dependent variables included wrist-worn actigraphy, Stanford Sleepiness Scale scores, marksmanship scores, obstacle course performance,(More)
OBJECTIVE A prototype interface was developed to support decision making during tactical operations; a laboratory experiment was conducted to evaluate the capability of this interface to support a critical activity (i.e., obtaining the status of friendly combat resources). BACKGROUND Effective interface design strategies have been developed for domains(More)
Naturalistic decision making (NDM) has become established as a methodological and theoretical perspective. It describes how practitioners actually make decisions in complex domains. However, NDM theories tend to focus on the human agents in the system. We extend the NDM perspective to include the technological agents in complex systems and introduce the(More)
Sleep requirements of adolescents and young adults are distinct from those of other age groups due to differences in the circadian rhythms of the sleep-controlling hormone, melatonin. This study examined the sleep patterns of cadets during their first year of training and study at the United States Military Academy (USMA). The study population included the(More)
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