Search results for: electrodermal-activity

Electrodermal Activity

Author : Wolfram Boucsein
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Electrodermal activity is one of the most frequently used psychophysiological evaluations in psychology research. Based on the 1992 edition of this work Electrodermal Activity covers advances in the field since the first publication in 1992. The current volume includes updated information on brain imaging techniques such as PET and fMRI, which provide further insight into the brain mechanisms underlying EDA. In addition, this volume is able to describe more reliably hypotheses that have been successfully tested since the first publication.

Electrodermal Activity what it Can Contribute to the Assessment of the Autonomic Nervous System

Author : Hugo F Posada-Quintero
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About 70 million people worldwide are affected by dysfunction of the autonomic nervous system (ANS). These dysfunctions can lead to life-threatening conditions, because ANS controls vital functions like heart rate, digestion, respiration, among others. Spectral analysis of heart rate variability (HRV) allows noninvasive assessment of the ANS. However, the low frequencies (0.04-0.15 Hz) of HRV are influenced by the two complementary branches of the ANS, the sympathetic and parasympathetic nervous systems; hence, the spectral analysis cannot separate the dynamics of these autonomic tones. Developing reliable noninvasive techniques for assessment of the ANS dynamics remains a challenge for scientists. Recently, measure of electrodermal activity (EDA) has gained popularity for ANS assessment. EDA signal represents the changes of conductance in the skin, produced by purely sympathetic innervation of sweat glands. Time-domain measures of EDA, such as the skin conductance level (SCL) and skin conductance responses (SCR), are correlated to the sympathetic control, but they lack of consistency. Surprisingly, EDA has been analyzed only in time domain. In this work, using a frequency domain measure via the spectral analysis, we established for the first time that frequency bands of the sympathetic tone in EDA is mostly confined to the 0.045-0.25 Hz range. We termed this power the EDASymp. Furthermore, utilizing a high-resolution time-varying approach we found that the frequency band of 0.08-0.24 Hz is most responsive to sympathetic tone, which we termed, the TVSymp. The EDASymp and TVSymp are more sensitive and consistent discriminators of orthostatic, physical and cognitive stress than time-domain measures of EDA and can quantitatively assess the sympathetic function. Moreover, we found that the sympathetic tone in EDA dynamically changes to higher frequencies when subjects exercise. This result can be useful for adjusting the bounds of HRV when heart rate increases. Currently, the same frequency bounds for the ANS for resting and exercise conditions have been used. Another application of EDA is monitoring of sleep deprivation. Using 24-hour sleep deprivation experiments, we found that high-frequencies (SCR) of EDA relate to vigilance whereas low-frequencies (SCL) relate to reactiveness. Based on these results, we found that EDA could potentially be used to assist in prevention of fatigue and stress which are the direct and dire consequences of prolonged wakefulness. As a final aim of my dissertation work, evaluations of novel dry carbon/salt/adhesive (CSA) electrodes for obtaining electrocardiogram, surface electromyogram and EDA were investigated. We found non-statistical difference between the carbon/salt/adhesive electrodes for the above mentioned applications when the electrodes were compared to the gold standard silver/silver chloride electrodes. Moreover, it was found that carbon electrodes exhibited better response to noise and motion artifacts when compared to hydrogel Ag/AgCl electrodes. Hence, we concluded that CSA electrodes can be reliably used as a surrogate of the Ag/AgCl electrodes along with the advantage of being more cost effective alternative as they have longer shelf-life.

Electrodermal Activity in Psychological Research

Author : William Prokasy
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Electrodermal Activity in Psychological Research summarizes the methodological problems involved in the application of electrodermal activity as a dependent variable to basic psychophysiological research. The approach of this nine-chapter book is generally from the molecular to the molar in sequence of chapters, from basic to applied research, and from the more elementary to the more complex independent variable manipulation. This book covers first the terminology, recording and measuring techniques, electronic circuits, and current theories of the physiological mechanisms of electrodermal responding. The following chapters deal with the theories of attention and arousal; the indices of electrodermal activity and their relationships to these theories; the problems of measurement and control; and the effects of various independent variable manipulation on simple and differential conditioning performance. The discussions then shift to instrumental conditioning of electrodermal activity and the use of electrodermal measures in research on personality and pathological states, such as with schizophrenics, retardates, depressives, psychotherapy, central nervous system damage, anxiety, and introversion-extroversion. This text further considers the presumed mechanisms underlying systematic desensitization and the relationship of these mechanisms to electrodermal activity. A chapter explores the several widely divergent areas of social psychological research where electrodermal activity has been applied as a dependent variable, including in attitude, empathy, small groups, and social interactions. The concluding chapter evaluates the scientific basis for the application of electrodermal measures to deception detection field.

Advances in Electrodermal Activity Processing with Applications for Mental Health

Author : Alberto Greco
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This book explores Autonomic Nervous System (ANS) dynamics as investigated through Electrodermal Activity (EDA) processing. It presents groundbreaking research in the technical field of biomedical engineering, especially biomedical signal processing, as well as clinical fields of psychometrics, affective computing, and psychological assessment. This volume describes some of the most complete, effective, and personalized methodologies for extracting data from a non-stationary, nonlinear EDA signal in order to characterize the affective and emotional state of a human subject. These methodologies are underscored by discussion of real-world applications in mood assessment. The text also examines the physiological bases of emotion recognition through noninvasive monitoring of the autonomic nervous system. This is an ideal book for biomedical engineers, physiologists, neuroscientists, engineers, applied mathmeticians, psychiatric and psychological clinicians, and graduate students in these fields. This book also: Expertly introduces a novel approach for EDA analysis based on convex optimization and sparsity, a topic of rapidly increasing interest Authoritatively presents groundbreaking research achieved using EDA as an exemplary biomarker of ANS dynamics Deftly explores EDA's potential as a source of reliable and effective markers for the assessment of emotional responses in healthy subjects, as well as for the recognition of pathological mood states in bipolar patients

Synchrony of Electrodermal Activity in a Socioeconomically and Racially Diverse Sample of Mothers and Preschoolers

Author : Emily Claire Mitaro
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Physiological synchrony occurs when caregivers and children match their biological states and provides important information about the caregiver-child relationship. Given the links between this relationship and child outcomes (e.g., Schneider, Atkinson, & Tardif, 2001), further study of synchrony is warranted. The present study examined physiological synchrony of electrodermal activity (EDA) between 56 mother-preschooler dyads. Mothers and children completed a baseline and an interactive task. Mothers' self-reported psychopathology symptoms and children's mother-rated internalizing and externalizing symptoms were examined as moderators of EDA synchrony. EDA synchrony was not found in the interactive task, but was significantly moderated by mothers' psychopathology symptoms at baseline. Specifically, during the baseline task, mothers with higher symptoms showed significant negative synchrony, while synchrony did not emerge for mothers with lower symptoms. Moderation by children's internalizing and externalizing symptoms was not significant. Limitations and future directions, including methodological considerations, are discussed.

Progress in Electrodermal Research

Author : Jean-Claude Roy
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Electrodennal activity refers to electrical changes across the skin in areas of the body that are psychologically responsive. The eccrine sweat glands are the primary detenninant of electrodennal activity, and these are psychologically active especially on the palms of the hands and the soles of the feet. As a matter of convenience, electrodennal activity is most often recorded from the palms. Over the years, the electrodennal response has been known as the psychogalvanic reflex, the galvanic skin response, the skin resistance response, the skin conductance response, and the skin potential response. The tenns psychogalvanic reflex and galvanic skin response have fallen into disuse among scientists, but are still to be found in psychology text books. of its early discovery, ease of measurement, and often easily observable Because response to experimental manipulations, the recording of electrodennal activity is one of the most frequently used methods in psychophysiology. Indeed, in the early years following the founding of the Society for Psychophysiological Research, electrodennal research so dominated the field that people worried that the society was simply an electrodennal society. Although other psychophysiological techniques have emerged as equally strong contributors to psychophysiology, electrodennal research continues to be important throughout the world. As a result of this massive research investment, there has been great progress in understanding electrodennal phenomena, as well as major advances in recording methods since the phenomenon was discovered.

Electrodermal Activity During Dissonant Music in Musicians and Non musicians

Author : Joshua Lee Chapin
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The purpose of this study was to investigate the subjective emotional and physiological responses to consonant and dissonant music excerpts in musicians and non-musicians. Participants were assigned to one of two groups, high experience (HE) or low experience (LE) based on their level of music experience and education. Participants from both groups listened to the same set of randomized musical excerpts half of which were consonant and half of which were dissonant. Participants self-reported ratings of perceived pleasantness, as well as Electromyography (EMG) and Electrodermal Activity (EDA) data were collected. Average Skin Conductance Responses (SCR) were averaged over all trials and conditions and compared in a mixed ANOVA analysis. It was expected that dissonant excerpts would elicit greater EDA responses overall and that there would be an even greater EDA response to dissonance in the HE group. Results showed no significant difference in overall EDA responses to consonance and dissonance (F(1,28)=.634, p=.433, r=.15). Musical experience did influence responses to dissonant excerpts showing significantly higher SCRs in the high musical experience group (F(1,28)=7.505, p=.011, r=.46). The results support the hypothesis that musical experience and education does influence perceptual and physiological responses to dissonance.

A Comprehensive Study of Electrodermal Activity in First episode Psychotic Patients and Their Relatives

Author : John William Ficken
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Electrodermal Activity During Free Imagery Free Association and Two Conditions of Autogenic Training

Author : Linda Dianne Leigh
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Cognitive Neuroscience of Emotion

Author : Richard D. Lane
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This book, a member of the Series in Affective Science, is a unique interdisciplinary sequence of articles on the cognitive neuroscience of emotion by some of the most well-known researchers in the area. It explores what is known about cognitive processes in emotion at the same time it reviews the processes and anatomical structures involved in emotion, determining whether there is something about emotion and its neural substrates that requires they be studied as a separate domain. Divided into four major focal points and presenting research that has been performed in the last decade, this book covers the process of emotion generation, the functions of amygdala, the conscious experience of emotion, and emotion regulation and dysregulation. Collectively, the chapters constitute a broad but selective survey of current knowledge about emotion and the brain, and they all address the close association between cognitive and emotional processes. By bringing together diverse strands of investigation with the aim of documenting current understanding of how emotion is instantiated in the brain, this book will be of use to scientists, researchers, and advanced students of psychology and neuroscience.

Electrodermal Activity as Related to Motor Performance in Depressed Subjects by Ingmar Dureman and Pirkko Saaren Sepp l

Author : Ingmar Dureman
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Unsupervised Motion Artifact Detection in Wrist measured Electrodermal Activity

Author : Yuning Zhang
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One of the main benefits of a wrist-worn computer compared to other computing platforms is its ability to collect a variety of physiological data in a minimally intrusive manner. Among these physiological data, electrodermal activity (EDA) is readily collected and provides a window into a person's emotional and sympathetic responses. Unfortunately, EDA data collected using a wearable wristband are easily influenced by motion artifacts (MAs) that may significantly distort the data and degrade the quality of analyses performed on the data if not identified and removed. Prior work has demonstrated that MAs can be successfully detected using supervised machine learning algorithms on a small data set collected in a lab setting. In this thesis, we demonstrate that unsupervised learning algorithms perform competitively and sometimes even better than supervised algorithms for detecting MAs on EDA data collected in both a lab-based and a real-world data set comprising about 23 hours of data. We also find, somewhat surprisingly, that accelerometer data do not appear to be very useful in detecting MAs in EDA, incorporating accelerometer data as well as EDA improves detection accuracy only slightly for supervised algorithms and significantly degrades the accuracy of unsupervised algorithms.

Efficient Wavelet based Artifact Removal for Electrodermal Activity in Real world Applications

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Highlights: Computationally efficient SWT based denosing of EDA signals is proposed. Laplace and GMM distribution fitting for the wavelet coefficients are equivalent. Effectiveness of the proposed method is proven against three state-of-the-art methods. Online validation for denosing is performed among 12 participants while performing stressing tasks. Abstract: Online monitoring of electrodermal activity (EDA) may serve as an economical and explicit source of information about actual emotional state and engagement level of users during their interaction with information and communications technologies (ICT) applications in real-world situations. In such contexts, however, EDA signal is affected by motion artifacts that introduce noise in the signal and can make it unusable. As the scope of movement minimization during EDA data acquisition is limited, this scenario demands online methods for detection and correction of artifacts with low computational cost. We propose an efficient wavelet-based method for artifacts attenuation while minimizing distortions, using a stationary wavelet transform (SWT) modeling the wavelet coefficients as a Laplace distribution. The proposed method was tested on EDA recordings from publicly available driver dataset collected during real-world driving, and containing a high number of motion artifacts, and the results were compared to those of three state-of-the-art methods for EDA signal filtering. In addition, the proposed method was tested for the online filtering of EDA signals collected while 12 volunteers conducted tasks designed to elicit various stress states. The results evidenced that the prediction of arousal states can be significantly improved after motion artifacts removal, and that the proposed method outperforms existing approaches and it has a lower computational cost. Taken together, these results evidence the effectiveness of the proposed method for online EDA filtering in real world scenarios.

The Psychopharmacology of Smoking

Author : Mangan
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This book examines why individuals smoke and looks at the complex interaction between the toxicology of smoking and genetically based susceptibility to smoking-related disease.

Psychophysiology

Author : Kenneth Hugdahl
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In our high-speed culture, terms like "stressed-out," "Type-A personality," "biofeedback," and "relaxation response" have become commonplaces. More than ever before, we are aware of the relationship between our mental and emotional states and our physical well-being. Findings from the field of psychophysiology, which investigates the reflexive interaction between psychology and physiology, have revised our approach to illness and its prevention and treatment. We know, for example, that stress, combined with other factors, increases vulnerability to heart attack and stroke. Successful treatment must include lifestyle changes to reduce the effects of stress on the body. In this important text, Kenneth Hugdahl presents a comprehensive introduction to the history, methods, and applications of psychophysiology and explores other areas concerned with the "mind-body interface," such as psychosomatic medicine, behavioral medicine, clinical psychology, psychiatry, neuropsychology, and cognitive neuroscience. By showing how social, behavioral, cognitive, and emotional events are mirrored in physiological processes, he gives us a clearer understanding of complex cognitive processes. This book illustrates psychophysiology's importance as a research and clinical tool and highlights its many contributions to the assessment and diagnosis of physical disorders. It also provides a framework for extending psychophysiological insights to other areas of psychology and neuroscience.

Autonomic Nervous System Responses of Electrodermal Activity and Heart Rate Response to an Auditory Stimulus

Author : Haig Musurlian
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Neuroscience based Cognitive Therapy

Author : Tullio Scrimali
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A pioneer of CBT explores recent advances in neuroscience, showing how they can be applied in practice to improve the effectiveness of cognitive therapy for clients with a wide range of diagnoses including mood disorders, anxiety disorders, eating disorders and schizophrenia Utilizes the latest advances in neuroscience to introduce tools that allow clinicians, for the first time, to directly measure′ the effectiveness of cognitive therapy interventions Rigorously based in neuroscientific research, yet designed to be readable and jargon–free for a professional market of CBT practitioners Covers theory, assessment, and the treatment of a wide range of specific disorders including anxiety disorders, mood disorders, eating disorders, addictions and schizophrenia Written by a respected pioneer in the field

Psychophysiological Recording

Author : Robert Morris Stern
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PART I. GENERAL ELEMENTS OF PSYCHOPHYSIOLOGY. 1. Psychophysiology. 2. Neurons and Muscles: The Sources of Psychophysiological Recordings. 3. Equipment Used in Psychophysiological Recording. 4. Psychophysiological Recordings. 5. Some Basic Principles of Psychophysiology. 6. Safety and Ethics in a Psychophysiology Laboratory. PART II. PSYCHOPHYSIOLOGY OF SPECIFIC ORGANS. 7. Brain: Electroencephalography and Imaging. 8. Muscles: Electromyography. 9. Eyes: Pupillography and Electrooculography. 10. Respiratory System. 11. Gastrointestinal Motility: Electrogastrography. 12. Cardiovascular System: He.

Brain Fiction

Author : William Hirstein
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The phenomenon of confabulation—the tendency to construct plausible-sounding but false answers and believe that they are true—and what it can tell us about the human mind and human nature.

Health Psychology

Author : Michael Feuerstein
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Although it has been assumed since early recorded history that psycho logical factors influence health and illness, it has only been within the past few years that a group of investigators and clinicians with a shared interest in the application of psychological principles and techniques to health and illness has existed. Over this same period of time, a number of multi-author books on the topic of health psychology and an associ ated field, behavioral medicine, have been published. Although these books are major resources for the investigator and the clinician in the field, it is often difficult for students, both undergraduate and graduate, to learn the basics of health psychology from such books. Thus, Health Psychology: A Psychobiological Perspective was written to provide such basics. The need for such a textbook in health psychology became appar ent to the first author when he was searching for reading material for an undergraduate course in health psychology at McGill University. This book grew out of the course in health psychology, and its structure represents the course content. The purpose of the book is to present the theoretical, empirical, and clinical aspects of the rapidly developing field of health psychology. Data from a number of subdisciplines within psychology and the behav ioral and health-related sciences are integrated throughout each chapter in an effort to provide a balanced perspective. Health Psychology explores the development of the field and its research methodologies, theoretical models, and intervention possibilities.