
Andrea WebbDraper Laboratory | Draper
Andrea Webb
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34
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Publications (34)
The detection of psychological stress using the electrocardiogram (ECG) signal is most commonly based on the detection of the R peak—the most prominent part of the ECG waveform—and the heart rate variability (HRV) measurements derived from it. For stress detection algorithms focused on short-duration time windows, there is potential benefit in incl...
Background:
Astronauts live and work in isolated, confined, extreme (ICE) environments that create both high stress and the need for high performance. The COVID-19 pandemic created ICE-like conditions across the globe by confining people to their homes under the ever-present threat of disease. Our goal is to understand the impact of prior experien...
Wearable physiological monitoring systems are becoming increasingly prevalent in the push toward autonomous health monitoring and offer new modalities for playful and purposeful interaction within human computer interaction (HCI). Sensing systems that can be integrated into garments and, therefore, daily activities offer promising pathways toward u...
Background: Electrocardiography (ECG) provides valuable information on astronaut physiological and psychological health. ECG monitoring has been conducted during crewed missions since the beginning of human spaceflight and will continue during astronauts’ upcoming long-duration exploration missions (LDEMs) in support of automated health monitoring...
Electrical signals produced within the human body can reveal information about a wide variety of physiological processes including physical activity, cardiac health, and psychological state. The industry standard for physiological signal detection is the use of adhesive electrodes that stick onto the skin. These electrodes can irritate the skin ove...
Several studies have demonstrated poor retention of extinction learning among individuals with posttraumatic stress disorder (PTSD). Gonadal hormone signaling in brain appears to influence the retention of extinction learning differently in women with and without PTSD. Women with PTSD, compared to trauma-exposed women without PTSD, show relative de...
Wearable health-monitoring systems should be comfortable, non-stigmatizing, and able to achieve high data quality. Smart textiles with electronic elements integrated directly into fabrics offer a way to embed sensors into clothing seamlessly to serve these purposes. In this work, we demonstrate the feasibility of electrocardiogram (ECG) monitoring...
The future of human space exploration will involve extra-vehicular activities (EVAs) on foreign planetary surfaces (i.e., Mars), an activity that will have significantly different characteristics than exploration scenarios on Earth. These activities become challenging due to restricted vision and limitations placed on sensory feedback from altered...
The future of human space exploration will involve extra-vehicular activities (EVA) on foreign planetary surfaces (i.e. Mars), an activity that will have significantly different characteristics than the common exploration scenarios on Earth. The required use of a bulky, pressurized EVA suit perceptually disconnects human explorers from the hostile...
Effective ways of presenting digital data are needed to augment a user’s experience in the real world without distracting or overloading them. We propose a system of systems approach for the design, development, and evaluation of information presentation devices, particularly augmented reality devices. We developed an evaluation environment that en...
Human operational performance can be augmented by system-level change, whether those changes are technological, organizational, or encompassing other facets of a system’s architecture. Any change must be assessed before it is adopted. Its impact on the individual—the physical and mental burden imposed by change—is as critical to understand as its i...
The current gold standard for diagnosis of mental health disorders is a clinical interview in which the patient and clinician discuss the patient?s symptoms and history. This process is subjective and can be adversely affected by the patient?s memory difficulties and ability to articulate what he or she is experiencing. There is also a concern that...
Traditional approaches for assessing user engagement within multimedia environments rely on methods that are removed from the human computer interaction itself, such as surveys, interviews and baselined physiology. We propose a context coherence approach that operationalizes engagement as the amount of independent user variation that covaries in ti...
Major Depressive Disorder (MDD) is a highly debilitating mental health concern that affects a large number of adults in the United States. The emotional context insensitivity (ECI) hypothesis argues that individuals with MDD disengage from the environment to defend themselves from futile activity. In the current study, electrocardiogram and pupillo...
Background
Post-traumatic stress disorder (PTSD) currently is diagnosed via clinical interview in which subjective self reports of traumatic events and associated experiences are discussed with a mental health professional. The reliability and validity of diagnoses can be improved with the use of objective physiological measures.Methods
In this stu...
Engagement (i.e., presence, immersion) is important in the development of educational media; engaged users are putatively more likely to grasp pedagogical content than disengaged users. Previous psychophysiological approaches to measuring engagement, however, have been largely counterproductive in that they rely on comparisons of physiologic signal...
Although EEG has become portable and amenable to investigating cognitive processes in realistic environments, inferences of processes from EEG (i.e., ERPs, PSDs) has largely been predicated on rigid and laboratory-controlled event-related designs. As such, it is unclear whether data from semi-structured, participant-driven tasks will be robust and...
In various embodiments, a physiological or behavioral signal is derived from a vertical force resulting from the entire weight of a subject. A system for measuring physiological and behavioral signals in a human subject may include a measurement platform for bearing the subject, at least one force sensor for measuring vertical force imparted by an...
Post-traumatic stress disorder (PTSD) currently is diagnosed via subjective reports of experiences related to the traumatic event. More objective measures are needed to assist clinicians in diagnosis. Physiological activity was recorded from 58 participants. Participants in the No Trauma/No PTSD group had no trauma exposure and no PTSD diagnosis. T...
Our goal was to evaluate an alternative to current methods for detecting deception in security screening contexts. We evaluated a new cognitive-based test of deception that measured participants' ocular-motor responses (pupil responses and reading behaviors) while they read and responded to statements on a computerized questionnaire. In Experiment...
Mediating interpersonal conflicts requires a complex set of skills best gained through well structured practice. This study provides pilot data from an evaluation of a conflict-mediation training platform that features a high-fidelity virtual human designed to emulate real-human interactions. Specifically, we tracked physiological signals from part...
This study examined the relationship between emotion and physiological measures of autonomic system response. Features of
electrodermal, cardiac, respiratory, movement, and oculomotor response were measured from a population of normal subjects
while they were presented standard acoustic and visual stimuli designed to evoke specific emotions. The su...
Draper Laboratory and MRAC have recently completed a comprehensive study to quantitatively evaluate deception detection performance under different interviewing styles. The interviews were performed while multiple physiological waveforms were collected from participants to determine how well automated algorithms can detect deception based upon chan...
Purpose. There were three objectives of this study: (1) To assess the possibility of using pupil diameter as an index of deception in the context of a comparison question polygraph test. (2) To determine if pupil diameter would make a significant contribution to an optimal multivariate classification equation in combination with the traditional pre...
An oculomotor test is described that uses pupil diameter and eye movements during reading to detect deception. Forty participants
read and responded to statements on a computerized questionnaire about their possible involvement in one of two mock crimes.
Twenty guilty participants committed one of two mock crimes, and 20 innocent participants commi...
Psychophysiologists often use repeated measures analysis of variance (RMANOVA) and multivariate analysis of variance (MANOVA) to analyze data collected in repeated measures research designs. ANOVA and MANOVA are nomothetic approaches that focus on group means. Newer multilevel modeling techniques are more informative than ANOVA because they charact...
The objectives of this investigation were to (1) identify elements that comprise an acceptable quality of life (Q-L) post-traumatic brain injury (TBI) from the perspectives of patients and families, and (2) explore patient and family satisfaction with treatment decisions relevant to QoL. The authors created, tested, and administered two forms (pati...