• Title, Summary, Keyword: physiological responses

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Correlation between Real-Time and Off-Time Subjective Assessments and Physiological Responses for Visual Picture Stimulus (시각자극에 대한 실시간 및 비 실시간 주관적 평가와 생리반응과의 상관관계)

  • Jeong, Sun-Cheol;Min, Byeong-Chan;Min, Byeong-Un;Kim, Sang-Gyun;O, Ji-Yeong;Kim, Yu-Na;Kim, Cheol-Jung;Park, Se-Jin
    • Journal of the Ergonomics Society of Korea
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    • v.18 no.3
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    • pp.27-39
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    • 1999
  • The purpose of this study was to approve the capability of human sensibility evaluation based on physiological responses and real-time subjective assessments. Three well-trained healthy human subjects were participated in the experiments. We measured physiological responses such as Heart Rate Variability(HRV), Galvanic Skin Response(GSR) and skin temperature under rest and visual stimulation conditions, respectively. Off-time subjective assessments were recorded before and after visual stimulations. Real-time subjective assessments were recorded during visual stimulations. The results of physiological responses and off-time and real-time subjective assessments were quantified and compared. The results showed that the correlation between physiological responses and real-time subjective assessments was high (83%) for both the positive and negative visual stimulation. The correlation between the physiological responses and off-time subjective assessments was high (83%) for the negative visual stimulation but was low (15%) for the positive visual stimulation. Although the current observation is preliminary and requires more careful experimental study, it appears that the correlation between real-time subjective assessment and physiological responses is higher than that of the off-time subjective assessment and physiological responses.

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Changes of Behavioral and Physiological Responses Caused by Color Temperature

  • Lee, Young-Chang;Min, Yoon-Ki;Min, Byung-Chan;Kim, Boseong
    • Science of Emotion and Sensibility
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    • v.18 no.2
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    • pp.37-44
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    • 2015
  • LED lighting has an advantage of adjusting color temperature. This change of color temperature may derive change in behavioral and physiological responses of the visual perception for indoor environments. This research examined the changes of behavioral and physiological responses caused by the color temperature. The environment was configured that the indoor temperature was 20 degrees centigrade or less as the perceived uncomfortable environment in winter. Then, the comfortable sensation vote (CSV) and the results of 3-back working memory test were measured as behavioral responses. In addition, the Electrodermal Activity (EDA) and Electrocardiogram (ECG) were measured as the responses of autonomics nervous system (ANS) in the three conditions of color temperature (red: 3862K, white: 5052K, blue: 11,460K). As a result, behavioral responses were not significant by the condition of color temperature, but the tendency of occupants' physiological relaxation appeared in the blue color temperature condition compared with the white color temperature condition. Although the color temperature of LED lighting might be a small factor in terms of the characteristics of indoor environment, it suggests that the color temperature could have an impact on the physiological changes in the parasympathetic nervous system.

Evaluation of Rustling Sound of Silk by Analysing Physiological Signals (생리 신호 분석을 통한 견직물의 마찰음 평가)

  • 박미란;조자영;조길수
    • Textile Science and Engineering
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    • v.39 no.1
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    • pp.116-124
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    • 2002
  • This study was performed to grasp how the rustling sounds of silk fabrics affected physiological responses of human beings to predict auditory comfort of fabric sound. Sound parameters and physical properties of test specimens were measured and their relationships with the physiological signals were analyzed, respectively. Physiological signals were acquired when each sound was presented to participants. The physiological signals employed in this study were electroencephalogram(EEG), pulse volume(PV), skin conductance level(SCL), and the ratio of low frequency over high frequency(LF/HF) from the power spectrum of heart rate variability(HRV). Sound parameters including LPT(level pressures of total sound), ΔL, Δf, loudness(Z), and sharpness(Z) were calculated and physical properties were measured by the KES-FB system. WT(tensile energy) and T(thickness) were the main factors used to determine loudness(Z) and LPT. LPT and loudness(Z) were found to be the most influential acoustic parameter on physiological responses. By the increase of these acoustic parameters, slow alpha wave and PV decreased, on the other hand, LF/HF and SCL increased. The increase of T of silk fabric was followed by the decrease of slow alpha wave and the increase of SCL, while the increase of WT induces the increase of PV. The threshold values of WT and T which begin to activate physiological responses were 7.8 gf.cm/$\textrm{cm}^2$ for PV and 0.26 mm for SCL.

Analysis of Physiological Responses and Use of Fuzzy Information Granulation-Based Neural Network for Recognition of Three Emotions

  • Park, Byoung-Jun;Jang, Eun-Hye;Kim, Kyong-Ho;Kim, Sang-Hyeob
    • ETRI Journal
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    • v.37 no.6
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    • pp.1231-1241
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    • 2015
  • In this study, we investigate the relationship between emotions and the physiological responses, with emotion recognition, using the proposed fuzzy information granulation-based neural network (FIGNN) for boredom, pain, and surprise emotions. For an analysis of the physiological responses, three emotions are induced through emotional stimuli, and the physiological signals are obtained from the evoked emotions. To recognize the emotions, we design an FIGNN recognizer and deal with the feature selection through an analysis of the physiological signals. The proposed method is accomplished in premise, consequence, and aggregation design phases. The premise phase takes information granulation using fuzzy c-means clustering, the consequence phase adopts a polynomial function, and the aggregation phase resorts to a general fuzzy inference. Experiments show that a suitable methodology and a substantial reduction of the feature space can be accomplished, and that the proposed FIGNN has a high recognition accuracy for the three emotions using physiological signals.

COMPARATIVE ANALYSIS OF PSYCHOPHYSIOLOGICAL REACTIVITY TO AUDITORY STIMULATION WITH AUTOMOBILE HORNS (자동차 경적소리에 대한 심리생리학적 반응 비교)

  • Estate Sokhadze
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.221-230
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    • 1999
  • Automobile horn's psychoacoustic characteristic and significance as a anturalistic signal of danger makes it a valuable auditory stimulus to study such psychophysiological responses as startle, orienting and defense reactions. However, comparison and differentiation of physiological responses to commercially available horns is a complicated task due to small contrast of technical features of horns and influence of such processes as habituation on physiological outcome with increased number of auditory stimulation trials. In the study on 10 college students we performed comparative analysis of tonic and phasic reactivity of physiological responses mediated by autonomic nervous system in order to identify role of habituation and decrement of autonomic responsivity, as well as possibility o differentiate subjectively most and least preferred and subjectively more appropriate horns according to physiological manifestations. It was showed that electrodermal and cardiovascular reactivity have concurrent patterns of adaptation to repeated stimulation, namely skin conductance variables habituated, cardiac reactivity failed to show signs of habituation, while vascular component of response were facilitated demonstrating marked sensitization. Differentiation of Physiological responses to horns with respect to their subjective rating scores was possible, however electrodermal reactivity was effective only at the first block of trials, while phasic and tonic cardiovascular reactivity differentiate responses during whole course of experiment. There are discussed possible autonomic mechanisms involved in mediation of observed results.

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The effect of pleasant olfactory stimulation on physiological responses

  • Kim, Yeon-Kyu;Shigeki Watanuki
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.121-124
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    • 2001
  • Using ordors with the different concentration of essential oils, e studied the effect of a pleasant olfactory stimulation on physiological responses. we examined psychological response, mental task and changes in cardiac, immunity and EEG in responses to 150times solution (feel easily) and 500times solution (feel with difficulty) which of essential oil (called PCK) were diluted in propylene glycol, and neutral (water). The 150times solution that was felt pleasant produced significant differences (p<0.05) in relative power change of beta activity in the left frontal region (Fp1, F3, F7) of the brain, and heart rate (HR) deceleration after mental task. these results are consistent with substantial research that has documented cardiac and EEG responses to pleasant stimuli. What is more, 150times solution increased the concentration of s-IgA know as an index of immunity.

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The Physiological Response on Wear Comfort of Polyethylene Terephthalate Irradiated by Ultra-violet

  • Choi, Hae-Young;Lee, Jung-Soon
    • Fibers and Polymers
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    • v.7 no.4
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    • pp.446-449
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    • 2006
  • The purpose of this study was to evaluate the comfort of PET clothing treated by UV. The physiological responses of the human body were investigated. Mean skin temperature and physiological signals such as Electroencephalogram (EEG), and heart rate (Electrocardiogram, (ECG)) were examined for 20 minutes during stable wearing conditions. Mean skin temperature was measured every two seconds using Ramanathan's method. Physiological responses were measured using Biopac MP100 series and analyzed using the software, Acqknowledge 3.5.2. Psychological effects were analyzed every five minutes. Comfort of untreated PET clothing decreased with the passage of time. Compared with PET clothing untreated, treated for 30 minutes, and treated for 90 minutes, the analysis of EEG showed that PET clothing treated for 90 minutes was the most comfortable after 20 minutes. In addition, the interval of the heart rate shown on the ECG was the highest in PET clothing treated for 90 minutes. Skin temperature was the lowest in PET treated for 90 minutes. We thus conclude that suitable UV irradiation would improve comfort.

The Effects of Habituation and Sensitization on Psychophysiological Differentiation of Responses to Auditory Stimulation with Automobile Horns

  • Estate M. Sokhadze;Sohn, Jin-Hun
    • Science of Emotion and Sensibility
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    • v.3 no.2
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    • pp.17-28
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    • 2000
  • Psychoacoustic characteristics of automobile horns play significant role in resulting subjective evaluation and psychphysiological reactions. However, comparison and differentiation of physiological responses to commercially available horns is a complicated task due to the small contrast in technical features of horns and the influence of such processes as habituation on physiological outcome with the increased number of auditory stimulation trials. In a study on 10 college students, there was performed comparative analysis of reactivity of physiological responses mediated by central and autonomic nervous systems in order to identify the role of habituation on decrement of psychophysiological responsivity and assess the ability to differentiate subjectively most and least preferred, as well as most and least appropriate horns according to physiological manifestations. The EEG and autonomic responses to 7 automobile horns were analyzed during 3 blocks of trials, with varying order of stimuli and changed acoustic parameters of horns in each block. Thus, responses were analyzed for totally 21 trials of auditory stimulation. It was shown that electrodermal and cardiovascular responses have different reactivity patterns to repeated stimulation: skin conductance measures habituated, cardiac reactivity showed no signs of habituation, and the vascular response demonstrated sensitization. The temporal EEG exhibited marked habituation of fast beta band power, while alpha-blocking effect did not habituate during the course of experiment. Differentiation of physiological responses of most and least preferred and appropriate horns was possible in our study, however, some cardiovascular reactivity measures differentiated during the entire course of the experiment, while EEG and electrodermal parameters showed significant differences only during first block of trials, and were later affected by the habituation.

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A Study on Simulator Sickness and Physiological Responses in Dynamic Driving Simulator (동적 자동차 시뮬레이터에서 Simulator Sickness와 생리적 반응에 대한 연구)

  • 민병찬;전효정;성은정;정순철;김철중
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.26 no.1
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    • pp.22-29
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    • 2003
  • The study was to evaluate psychological and physiological changes of simulator sickness in the controlled condition of driving a car (1 hr. at speed of 60 km/h) in a graphic simulator. Simulator sickness was measured and analyzed every 5 min using both subjective responses(i.e., Simulator Sickness Questionnaire) and Physiological signals(EEG, HRV, Skin Temperature, GSR). The results showed that there was significant differences in subjective response 10 min after the main experiment. From 10 min after the driving, the level of subjective simulator sickness increased significantly, relative one of the rest condition. There also was significant differences in physiological responses between the rest and the 5 min after from the start of driving : for EEG, $\delta$ and $\theta$ at Fz area increased, while $\alpha$ decreased; the averaged R-R interval and skin temperature decreased; LF/HF and GSR increased. The results indicated that simulator sickness was induced by activation of the autonomic nerves and inactivation of the central nerves.

Physiological Signal Analyses of Frictional Sound by Structural Parameters of Warp Knitted Fabrics

  • Cho Gilsoo;Kim Chunjeong;Cho Jayoung;Ha Jiyoung
    • Fibers and Polymers
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    • v.6 no.1
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    • pp.89-94
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    • 2005
  • The purpose of this study is to offer acoustical database of warp knitted fabrics by investigating frictional sound properties and physiological responses according to structural parameters such as construction, lap form, and direction of mutual guide bar movement. Fabric sounds of seven warp knitted fabrics are recorded, and Zwicker's psychoacoustic param­eters - loudness(Z), sharpness(Z), roughness(Z), and fluctuation strength(Z) - are calculated. Also, physiological responses evoked by frictional sounds of warp knitted fabrics are measured such as electroencephalogram (EEG), the ratio of high fre­quency to low frequency (HF/LF), respiration rate (RESP), skin conductance level (SCL), and photoplethysmograph (PPG). In case of constructions, frictional sound of sharkskin having higher loudness(Z) and fluctuation strength(Z) increases RESP. By lap form, open lap has louder and larger fluctuating sound than closed lap, but there aren't significant difference of physi­ological responses between open lap and closed lap. In direction of mutual guide bar movement, parallel direction evokes bigger changes of beta wave than counter direction because of its loud, rough, and fluctuating sound. Fluctuation strength(Z) and roughness(Z) are defined as important factors for predicting physiological responses in construction and mutual guide bar movement, respectively.