Lawrence G. Shattuck

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STUDY OBJECTIVES Sleep patterns of young adults are different from those of other age groups.. This study examined sleep patterns of cadets during their first year at the United States Military Academy. DESIGN This paper presents initial results of a 4-year longitudinal investigation into sleep patterns of college-age men and women. SETTING Data were(More)
Process control (Woods, O’Brien, and Hanes, 1987), military command and control (van Creveld, 1985; Shattuck and Woods, 1997), and air traffic management (Smith et al., 1998) are examples of distributed supervisory control systems. Distributed supervisory control systems are hierarchical and cooperative. They include remote supervisors who work through(More)
Modern warfare has witnessed the proliferation of coalition efforts to contain terrorism. To be successful, these efforts rely upon the effective integration of human and technological agents. Typically, models and analyses of network centric warfare (NCW) focus on technological aspects of a system, eschewing the roles, contributions and decisions made by(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)
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)
Forty-nine U.S. Army officers with recent combat experience were surveyed to assess their units' sleep patterns and to determine the tactics, techniques, and procedures used to counter the effects of sleep deprivation in their units. Despite Army policy requiring units to develop and implement sleep management plans, nearly 80% of the participants reported(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)
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)