Another Look at the Relationship of Electrodermal Activity to Electrode Contact Area

Mahon, Mary L.; Iacono, William G.

doi:10.1111/j.1469-8986.1987.tb00280.x

Cited by 9 publications

(4 citation statements)

References 8 publications

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“…Instead of calculating the specific conductance, the size of the electrodes should be provided for purposes of comparison. In contrast, Mahon and Iacono (1987) found a linear relationship between electrolyte/skin contact areas, which they varied in size in six steps from 0.131 to 0.786 cm 2 , and the SCL/SCR amp. Thus, they also supported reporting the specific conductance.…”

Section: Taking the Electrode Area Into Accountmentioning

confidence: 72%

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Electrodermal Activity

Boucsein

2012

1,574

1,589

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except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights.Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) Foreword to the Second EditionAs noted by David Lykken in the foreword to the first edition of this book, electrodermal activity was observed for the first time in Germany. A quartercentury later the scientific study of psychology also originated in Germany. Over time, however, the focus of psychological research, including the then new field of psychophysiology, shifted to the United States and Great Britain. This trend to the dominance of the United States and Great Britain was prolonged by the devastation of World War II and its aftermath in Germany (and elsewhere in continental Europe). Slowly at first and then more rapidly, German psychological science, including psychophysiology, recovered. For several decades German psychophysiologists have been a major force in psychophysiology. With the publication of the first English edition of this book in 1992, it became essential for electrodermal researchers worldwide again to learn from our German colleagues.When I came into psychophysiology in the mid-1960s, electrodermal activity was the most common system studied. Because of its popularity, a large literature had emerged on the physiological mechanisms producing these changes in the electrical properties of the skin and on the best methodology for recording them. Major reviews and/or chapters had been published or soon were to be published by Peter Venables and Irene Martin, Robert Edelberg, and David Lykken. Later reviews and articles were published by Venables and Margaret Christie, and by me. A chapter in 1990 by Michael Dawson, Anne Schell, and Diane Filion was especially noteworthy for its coverage of the psychological applications of electrodermal measures.Note that all these publications were journal articles and chapters and that most of them focused almost entirely on mechanisms and methodology. The publication of this book, first in German and then in English, provided the first book on electrodermal activity, and one that extensively covers psychological applications as well as mechanisms and methodology. Again to quote David Lykken back in 1992, "The return of German scholarship to what I shall loftily call the high table of psychophysiology is exemplified by this fine book, the most comprehensive treatise on the electrodermal system to appear in any language . . ." I completely agree with v that evaluation. Professor Boucsein's outstanding scholarship has produced a book of such breadth of coverage ...

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Section: Taking the Electrode Area Into Accountmentioning

confidence: 72%

“…2.2.3.2). However, results reported by Mahon and Iacono (1987) indicated a marked linear dependence of the SCL and the SCR amp. upon the skin/electrolyte contact area (Sect.…”

Section: Choice or Assembling Of Electrodesmentioning

confidence: 86%

Electrodermal Activity

Boucsein

2012

1,574

1,589

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“…The measurement of SC was accomplished by a constant voltage (0.5 V) (23) through bipolarly applied Ag-AgC1 electrodes (0.64 cm2 each) filled with Nacl electrolyte, nearly isotonic to sweat (24)(25)(26), fixed on the palmar surface of the second and third fingers. The SC was expressed in micro Siemens per cm2 effective electrode area (27)(28)(29).…”

Section: Electrodermal Activitymentioning

confidence: 99%

Electrodermal activity in antidepressant medicated and unmedicated depressive patients and in matched healthy subjects

Thorell

Kjellman

d'Elia

1987

Acta Psychiatr Scand

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A group of 59 depressive in- and outpatients displayed statistically significantly subnormal electrodermal activity (EDA) according to the skin conductance level, the skin conductance response magnitude, the skin conductance response rate, and the index of nonresponding during neutral tone stimulation, compared to 59 mentally and somatically healthy subjects, individually matched for age and sex. Comparisons between 20 antidepressant medicated and 20 unmedicated patients, matched for age, and comparisons between 21 drug-free patients and 10 patients medicated exclusively with antidepressants yielded no statistically significant difference in any EDA variable. However, all the electrodermal central values were somewhat lower in the medicated patients, possibly an effect of greater severity of symptoms. The present and previous findings offer strong support to the hypothesis of a subnormal function of the electrodermal activity in groups of depressive patients.

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“…Figure 8b gives an example of simultaneous bilateral measurement with the same type of electrode but with different effective electrode areas. A monotonic, linear relationship between EDA and electrode size has been found in earlier studies (Mahon ML and Iacono WG, 1987), and dividing the measured conductance by the effective area of the electrode to represent the skin surface conductance density may provide a more comparable measure between studies.…”

Section: The Influence Of the Electrode On The Measurementmentioning

confidence: 56%

Current trends and opportunities in the methodology of electrodermal activity measurement

Tronstad¹,

Amini²,

Bach³

et al. 2022

Physiol. Meas.

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Electrodermal activity (EDA) has been measured in the laboratory since the late 1800s. Although the influence of sudomotor nerve activity and the sympathetic nervous system on EDA is well established, the mechanisms underlying EDA signal generation are not completely understood. Owing to simplicity of instrumentation and modern electronics, these measurements have recently seen a transfer from the laboratory to wearable devices, sparking numerous novel applications while bringing along both challenges and new opportunities. In addition to developments in electronics and miniaturization, current trends in material technology and manufacturing have sparked innovations in electrode technologies, and trends in data science such as machine learning and sensor fusion are expanding the ways that measurement data can be processed and utilized. Although challenges remain for the quality of wearable EDA measurement, ongoing research and developments may shorten the quality gap between wearable EDA and standardized recordings in the laboratory. In this topical review, we provide an overview of the basics of EDA measurement, discuss the challenges and opportunities of wearable EDA, and review recent developments in instrumentation, material technology, signal processing, modeling and data science tools that may advance the field of EDA research and applications over the coming years.

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Another Look at the Relationship of Electrodermal Activity to Electrode Contact Area

Cited by 9 publications

References 8 publications

Electrodermal Activity

Electrodermal Activity

Electrodermal activity in antidepressant medicated and unmedicated depressive patients and in matched healthy subjects

Current trends and opportunities in the methodology of electrodermal activity measurement

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