**3. Conclusion**

IA is a hot and serious issue worldwide, and psychophysiological relationship between emotion and IA using physiological signals was studied. This study was not only a hypothesis testing research, but also a hypothesis generating research. Emotion and physiological signals play important roles in (dynamic) expression and regulation of emotional responses to IA. Emotional induction experiments were conducted to acquire respiratory signals (thoracoabdominal movements), ECG signals, facial images, and self-assessed emotional intensity of IA abusers and IGD abusers. Complementary Ensemble Empirical Mode Decomposition (CEEMD) was also adopted as a feature extraction method for respiratory signals without phase loose or distortion. The power values, respiratory amplitude, of dominant frequency from thoracic movement and the abdominal movement in HIA and LIA groups were analyzed. The HIA group and the LIA group expressed different respiratory response upon positive and negative emotional inductions. The induction effects of emotional picture and film stimulation were also different. The autonomic nervous responses were also considered. RSA and HRV index computed from the ECG signals, reflected autonomic nervous system (ANS) activity, and particularly vagus nerve regulation (RSA reactivity). The results revealed that the HIA group had a lower RSA level than the LIA group. IA abusers (HIA) exhibited stronger RSA reactivity following negative emotion, but exhibited weaker RSA reactivity following positive emotion. The emotional responses of IGD abusers were also examined. IGD abusers had stronger happiness feelings to positive emotional online game films, and felt multiple negative emotions to negative emotional online game films. IGD abusers have more positive emotion, and stronger sympathetic activity, but weaker physiological activity to the online game films than those of people without IGD. This study provides results of respiration, HRV index, and RSA reactivity, the ANS and vagus nerve activity of IA abusers, and assists further study of the emotion regulation of the ANS for IA abusers.

**Author details**

Dai-Ling Hsieh<sup>1</sup>

Hsinchu, Taiwan

**References**

Tung University, Hsinchu, Taiwan

Clinical Practice. 1999;**17**:19-31

& Behavior. 1998;**1**:237-244

and Tzu-Chien Hsiao2

\*Address all correspondence to: labview@cs.nctu.edu.tw

\*

1 Institute of Computer Science and Engineering, National Chiao Tung University,

2 Institute of Biomedical Engineering, Department of Computer Science, National Chiao

Investigation of Emotion Characters of Internet Abusers Using Psychophysiological Signals

http://dx.doi.org/10.5772/intechopen.73692

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[1] Internet World Stats. World Internet Users and 2017 Population Stats [Internet]. 2017. Available from: http://www.internetworldstats.com/stats.htm [Accessed: June 30, 2017]

[2] Spada MM. An overview of problematic Internet use. Addictive Behaviors. 2014;**39**:3-6 [3] Young KS. Internet addiction: Symptoms, evaluation and treatment. Innovations in

[4] Chen S-H, Weng L-J, Su Y-J, Wu H-M, Yang P-F. Development of a Chinese internet addiction scale and its psychometric study. Chinese Journal of Psychology. 2003;**45**:279-294 [5] Niemz K, Griffiths M, Banyard P. Prevalence of pathological Internet use among university students and correlations with self-esteem, the general health questionnaire (GHQ),

[6] Yuan K, Qin W, Wang GH, Zeng F, Zhao LY, Yang XJ, et al. Microstructure abnormalities

[8] Young KS. Psychology of computer use: XL. Addictive use of the Internet: A case that

[9] Young KS. Internet addiction: The emergence of a new clinical disorder. CyberPsychology

[10] Young KS. Internet addiction—A new clinical phenomenon and its consequences.

[11] Leung L. Net-generation attributes and seductive properties of the Internet as predictors of online activities and Internet addiction. Cyberpsychology & Behavior. 2004;**7**:333-348

[12] Shaw M, Black DW. Internet addiction: Definition, assessment, epidemiology and clini-

[7] Goldberg I. Internet Addiction Disorder [Retrieved November, 1996]. 2004. p. 24

and disinhibition. Cyberpsychology & Behavior. 2005;**8**:562-570

breaks the stereotype. Psychological Reports. 1996;**79**:899-902

American Behavioral Scientist. 2004;**48**:402-415

cal management. CNS Drugs. 2008;**22**:353-365

in adolescents with internet addiction disorder. PLoS One. 2011;**6**:8
