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1
Content available remote Badania terenowe wpływu pola elektromagnetycznego na wyniki pomiaru aktywności elektrodermalnej
Sztafrowski Dariusz, Szczuka Edyta
Przegląd Elektrotechniczny
|
2023
|
R. 99, nr 1
226--229
PL
Prezentowana praca jest kontynuacją wcześniej prowadzonych badań oceny wpływu PEM o częstotliwości 50Hz na organizm dokonywanych w oparciu o wyniki pomiaru aktywności elektrodermalnej (ang. electrodermal activity - EDA). W prowadzonych obecnie badaniach terenowych dokonano wstępnych pomiarów EDA w biologicznie aktywnych punktach zlokalizowanych na dłoniach i stopach, w warunkach narażenia na środowiskowy wpływ PEM.
EN
The presented work is a continuation of the previously conducted research to assess the impact of EMF with a frequency of 50 Hz on the body based on the results of electrodermal activity (EDA) measurements. Initial EDA measurements were made in the currently conducted field studies at biologically active points located on the hands and feet under conditions of exposure to the environmental impact of EMF.
2
Content available remote Gray-level co-occurrence matrix of Smooth Pseudo Wigner-Ville distribution for cognitive workload estimation
Mirzaeian Rezvan, Ghaderyan Peyvand
Biocybernetics and Biomedical Engineering
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2023
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Vol. 43, no. 1
261--278
EN
Automatic, cost-effective, and reliable cognitive workload estimation (CWE) is one of the important issues in diagnosis and treatment of neurocognitive diseases, cognitive performance improvement and error preventive strategies. To address this issue, this paper has proposed a novel and robust CWE method by detecting the time–frequency (TF) changes of electrodermal activities (EDA). Firstly, the local and global properties of the time-variant characteristics of EDA have been presented using Smooth Pseudo WignerVille distribution with enhanced TF resolution. Then, the transient changes in TF images of EDA signals have been quantified using a set of textural features based on Gray Level Co-occurrence Matrix descriptor (GLCM). Several static and dynamic classifiers, such as support vector machine, K- k-nearest neighbor, cascade forward neural network, and recurrent neural network have been explored. A real EDA data experiment recorded during arithmetic task with different workload levels have been used to evaluate the performance of the proposed method. The obtained results have confirmed that it can achieve a high estimation performance of 97.71% using contrast feature for discrimination of three workload levels. Further analysis has also suggested that the model is robust to GLCM parameters and classifiers and can provide a better tradeoff between computational complexity and high performance using minimum number of textural features in comparison with previous studies.
3
Content available remote Badania wpływu pola magnetycznego 50 Hz na wyniki pomiaru aktywności elektrodermalnej
Sztafrowski Dariusz, Szczuka Edyta
Przegląd Elektrotechniczny
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2022
|
R. 98, nr 1
119--122
PL
Przeprowadzony w niniejszej pracy eksperyment jest wstępną próbą oszacowania przydatności pomiaru aktywności elektrodermalnej (EDA) do oceny wpływu pola elektromagnetycznego (PEM) na organizm w badaniu o charakterze kazuistycznym.
EN
The experiment carried out in this paper is an initial attempt to estimate the usefulness of the measurement of electrodermal activity (EDA) for the assessment of the impact of electromagnetic field (PEM) on the body using a case study approach.
4
Projekt oraz badania autonomicznego układu przeznaczonego do pomiaru GSR
Słapczyński Paweł, Sondej Tadeusz
Elektronika : konstrukcje, technologie, zastosowania
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2022
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Vol. 63, Nr 9
34--39
PL
W artykule opisano projekt układu elektronicznego przeznaczonego do badania reakcji GSR (ang. Galvanic Skin Response) z uwzględnieniem trudności związanych z charakterem pomiaru. Omówiono w nim biologiczny mechanizm powstawania reakcji skórno-galwanicznej, budowę zaprojektowanego urządzenia pomiarowego oraz metodykę badań przeprowadzonych w celu sprawdzenia użyteczności urządzenia.
EN
The article describes the project of GSR measurement system, taking into account all difficulties related to the type of the measurement. It discusses the biological mechanism of the skin-galvanic reaction, the construction of the designed device for measuring this reaction, and the methodology of tests carried out to check the usefulness of the device.
5
Content available Electrodermal activity measurements for detection of emotional arousal
Kołodziej M., Tarnowski P., Majkowski A., Rak R. J.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2019
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Vol. 67, nr 4
813--826
EN
In this article, we present a comprehensive measurement system to determine the level of user emotional arousal by the analysis of electrodermal activity (EDA). A number of EDA measurements were collected, while emotions were elicited using specially selected movie sequences. Data collected from 16 participants of the experiment, in conjunction with those from personal questionnaires, were used to determine a large number of 20 features of the EDA, to assess the emotional state of a user. Feature selection was performed using signal processing and analysis methods, while considering user declarations. The suitability of the designed system for detecting the level of emotional arousal was fully confirmed, throughout the number of experiments. The average classification accuracy for two classes of the least and the most stimulating movies varies within the range of 61‒72%.
6
Content available remote Evaluation of the uncanny valley hypothesis based on declared emotional response and psychophysiological reaction
Ratajczyk Dawid, Jukiewicz Marcin, Lupkowski Paweł
Bio-Algorithms and Med-Systems
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2019
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Vol. 15, no. 2
art. no. 20190008
EN
The uncanny valley (UV) hypothesis suggests that the observation of almost human-like characters causes an increase of discomfort. We conducted a study using self-report questionnaire, response time measurement, and electrodermal activity (EDA) evaluation. In the study, 12 computer-generated characters (robots, androids, animated, and human characters) were presented to 33 people (17 women) to (1) test the effect of a background context on the perception of characters, (2) establish whether there is a relation between declared feelings and physiological arousal, and (3) detect the valley of the presented stimuli. The findings provide support for reverse relation between human-likeness and the arousal (EDA). Furthermore, a positive correlation between EDA and human-likeness appraisal reaction time upholds one of the most common explanations of the UV - the categorization ambiguity. The absence of the significant relationship between declared comfort and EDA advocates the necessity of physiological measures for UV studies.
7
Content available Badanie wpływu dźwięków niskiej częstotliwości na poziom aktywności elektrodermalnej
Damijan Z.
Diagnostyka
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2005
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Vol. 35
95--100
PL
Praca przedstawia badania wpływu dźwięków niskiej częstotliwości na poziom aktywności elektrodermalnej skóry (ozn. EDA). Badania stanowiły trzy niezależne sytuacje badawcze, pierw-sza: dla częstotliwości bodźca fśr=7 Hz przy poziomie ciśnienia akustycznego Lp = 120 dB HP, druga - (fśr=18 Hz, Lp = 120 dB HP) oraz trzecia - (fśr=40 Hz, Lp = 110 dB HP). Każdy, 35 minu-towy, ekspe-ryment składał się z trzech etapów. Etap I - 5 minutowy - bez ekspozycji bodźca. Etap II z 20 mi-nutowa ekspozycją na uczestników bodźca dźwiękowego niskiej częstotliwości. Trzeci etap 10 minutowy bez ekspozycji bodźca. W każdym eksperymencie w sposób ciągły rejestro-wano wyty-powane parametry EDA.
EN
The paper investigates the effects of low-frequency sound exposure on the level of elec-trodermal activity (EDA). The experimental programme involved three independent tests 1st ex-periment: frequency fśr = 7 Hz, acoustic pressure Lp = 120 dB HP, 2nd experiment - (fśr = 18 Hz, Lp = 120 dB HP), 3rd experiment - (fśr = 40 Hz, Lp = 110 dB HP). Each 35 minutes' long session involved three stages. During the first stage, lasting 1 -5 minutes, there was no low-frequency sound exposure. During the second stage participants were exposed to low-frequency sound for 20 min. The third stage did not involve any low-frequency sound exposure. During each experiment selected EDA parameters were monitored on an online basis.
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