NASRI Publications
"Understanding how Americans adapt, so we're ready when it matters."
The following represents a summary of research published by NASRI-affiliated researchers. Full papers are available through the National Institutes of Health (NIH) library system or by direct request to the Institute.
FY1996 Published Papers
"Cortisol Regulation and Decision Latency in Sustained High-Stress Wilderness Environments"
Abstract: This study examined cortisol output, reaction time, and decision accuracy in 84 adult subjects deployed across three wilderness field sites over periods ranging from 72 hours to 14 days. Subjects were exposed to sustained environmental stressors including pursuit scenarios, navigation challenges under time pressure, and enforced isolation from social contact. Findings indicate statistically significant cognitive narrowing after 36 hours of sustained duress, with executive function and risk assessment most severely affected. Individual variance was substantially predicted by prior physical conditioning and baseline cortisol reactivity. Implications for civilian emergency preparedness training design are discussed.
Field note: The 84 subjects referenced in this paper represent a subset of the 847 total subjects deployed in FY1996. Selection criteria for this sub-study and anonymization protocols are detailed in the paper's supplementary materials.
"Wayfinding Retention Under Acute Adrenergic Load: A Field Study"
Abstract: Sixty-one adult subjects navigated unfamiliar wilderness terrain using compass headings and basic landmark identification under controlled stress conditions designed to simulate acute threat scenarios. The study measured spatial memory retention, compass reading accuracy, decision speed at navigational choice points, and route completion rates as a function of measured adrenaline load. Results indicate that acute adrenergic load above the 80th percentile of baseline correlates with a 43% reduction in successful wayfinding completion and a 71% increase in circular navigation patterns. Subjects with prior military or search-and-rescue experience showed significantly attenuated performance decrements. Findings have direct applications for civilian emergency preparedness training and for the design of navigation-based resilience interventions.
"Psychological Disengagement Thresholds in Isolated Civilian Subjects"
Abstract: This longitudinal field study examined behavioral and psychological disengagement in 112 civilian subjects experiencing sustained isolation, environmental threat, and goal obstruction over periods ranging from 4 to 21 days. Disengagement was operationally defined as the cessation of active goal-directed survival behavior, including movement toward a stated objective, response to environmental navigational cues, and self-protective behavior in the presence of active threat. Median time to disengagement onset was 6.3 days for subjects without prior psychological resilience training and 11.7 days for subjects with documented prior high-stress experience. Disengagement was preceded in 91% of cases by a distinct behavioral transition period characterized by reduced locomotion, decreased vocalizations, and increased self-directed behavior. Findings will inform FEMA's revised civilian resilience modeling framework scheduled for 1998 release.
Note: The phrase "active threat" in the above abstract refers to the programmatic pursuit scenarios conducted by contracted field personnel as part of the standard NASRI field study protocol.
"Population Resilience Variance by Demographic Cohort: Preliminary Findings"
Abstract: Drawing on the full FY1994-1996 NASRI field data archive, this preliminary analysis examines survival behavior variance across demographic cohorts defined by age, sex, physical conditioning, prior vocational stress exposure, and social network size at intake. Key preliminary findings include: subjects with social network sizes below the 10th population percentile at intake demonstrate statistically distinct stress response profiles, including elevated baseline cortisol, accelerated disengagement threshold timelines, and increased flight response efficiency in pursuit scenarios. Subjects aged 24-31 with documented prior physical conditioning outperform all other cohorts on composite survival behavior metrics. Full findings are pending completion of FY1997 data collection and will be submitted for external peer review in 1998.
Historical Research Archive (1970 to 1989)
The following records represent research conducted by the Office of Emergency Preparedness prior to the formal establishment of NASRI in 1991.
"Adaptive Stress Thresholds: A Twenty-Year Retrospective"
Abstract: A summary of research conducted from 1969 to 1989 confirms the predictability of human collapse under stress. The establishment of the Adaptive Stress Threshold provides a metric for national resilience. This retrospective argues for the formal chartering of a dedicated research institute to continue this work.
"Wayfinding Degradation under Sleep Deprivation and Chromatic Stress"
Abstract: Subjects were tasked with navigating complex terrain while deprived of sleep and exposed to red light pulses. Navigation accuracy drops by sixty percent within forty-eight hours. The combination of stressors creates a synergistic effect on cognitive failure. This study informs the design of containment environments.
"Physiological Markers of Terminal Disengagement"
Abstract: Identification of biological indicators for terminal disengagement is now possible. Specific shifts in brainwave activity and heart rate variability precede the cessation of survival effort. Monitoring these markers allows researchers to predict the exact moment of subject failure.
"Red Light Project: Phase II Luminance Thresholds"
Abstract: Phase II testing focuses on the specific intensity required to trigger panic responses. Controlled increases in red light luminance correlate with heightened heart rate and erratic movement. Subjects lose the ability to navigate simple mazes when lighting exceeds 500 lux.
"Subject Disengagement in Sub-Zero Isolation"
Abstract: Observations of subjects in extreme cold isolation indicate a predictable pattern of mental withdrawal. Initial survival behaviors subside after seventy-two hours. Subjects enter a state of terminal disengagement. Physical activity ceases despite available resources.
Paper Request Form (FOIA)
In accordance with the Freedom of Information Act (5 U.S.C. ยง 552), full research papers may be requested using the form below. Please allow 30-90 business days for administrative processing and redaction.