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Psychiatry Res. 2017 Mar;249:343-348. doi: 10.1016/j.psychres.2017.01.044. Epub 2017 Jan 19.

Cross-cultural adaptation and psychometric properties of the Korean Scale for Internet Addiction (K-Scale) in Japanese high school students.

Author information

1
School of Health and Medical Sciences, Seton Hall University, United States of America.
2
Department of Education, Seoul National University, Republic of Korea.
3
National Information Society Agency, Republic of Korea.
4
Department of Psychiatry, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Republic of Korea.
5
Department of Psychology, University of Hong Kong, Hong Kong.
6
Department of Psychology, Asia University, Taiwan.
7
Department of Children and Women's Health, Osaka University Graduate School of Medicine, Japan. Electronic address: watanabe@sahs.med.osaka-u.ac.jp.

Abstract

The Korean Scale for Internet Addiction (K-Scale) was developed in Korea for assessing addictive internet behaviors. This study aims to adopt K-Scale and examine its psychometric properties in Japanese adolescents. In 2014, 589 (36.0% boys) high school students (Grade 10-12) from Japan completed a survey, including items of Japanese versions of K-Scale and Smartphone Scale for Smartphone Addiction (S-Scale). Model fit indices of the original four-factor structure, three-factor structure obtained from exploratory factor analysis, and improved two-factor structure of K-Scale were computed using confirmatory factor analysis, with internal reliability of included items reported. The convergent validity of K-Scale was tested against self-rated internet addiction, and S-Scale using multiple regression models. The results showed that a second-order two-factor 13-item structure was the most parsimonious model (NFI=0.919, NNFI=0.935, CFI=0.949, and RMSEA=0.05) with good internal reliability (Cronbach's alpha=0.87). The two factors revealed were "Disturbance of Adaptation and Life Orientation" and "Withdrawal and Tolerance". Moreover, the correlation between internet user classifications defined by K-Scale and self-rating was significant. K-Scale total score was significantly and positively associated with S-Scale total (adjusted R2=0.440) and subscale scores (adjusted R2=0.439). In conclusion, K-Scale is a valid and reliable assessment scale of internet addiction for Japanese high school students after modifications.

KEYWORDS:

Adolescents; Internet Addiction; Smartphone Addiction

PMID:
28152469
DOI:
10.1016/j.psychres.2017.01.044
[Indexed for MEDLINE]

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