Study into Relationship between Uchida–Kraepelin Psychodiagnostic Test Results and Number of Blinks

  • Shunsuke Nakano CNS Co., Ltd.
  • Yoichi Kageyama Akita University


Data generated by automatically and quantitatively evaluating subjects’ mental and physical conditions can contribute to the improvement of quality of life. The Uchida–Kraepelin psychodiagnostic test not only estimates the individuality of a person but also reflects their mental and physical conditions. To associate the results of this test with objective data, the relationship between the number of blinks and the number of calculations a subject was able to perform in a specific time period was investigated. Analysis of the experimental results indicated that: (a) there was a negative correlation between the number of calculations and number of blinks; (b) the “late increase rate” indicated by the Uchida–Kraepelin psychodiagnostic test was also reflected in the test medium of using a personal computer (PC); (c) there was a significant difference in the number of blinks recorded between the first and second testing periods; and (d) excluding outliers was an effective approach to more reliable detection of significant differences between the first and second testing periods.

Author Biographies

Shunsuke Nakano, CNS Co., Ltd.
Human-Centered Computing Course, Graduate School of Engineering Science
Yoichi Kageyama, Akita University
Human-Centered Computing Course, Graduate School of Engineering Science


Special issue: How to bring energy and growth to Japan by strategic use of smart ICT, Ministry of Internal Affairs and Communications, access date: 2020.1.

Y. Doi, “Introduction-Conceptual Issues on Quality of Life (QOL) and Importance of QOL”, Research Journal of the National Institute of Public Health, Vol.53, No.3, pp.176- 180, 2004.

S. Fukuhara, J. E. Ware Jr., M. Kosinski, S. Wada and B. Gandek, “Psychometric and Clinical Tests of Validity of the Japanese SF-36 Health Survey”, Journal of Clinical Epidemiology, Vol.51, No.11, pp.1045-1053, 1998. DOI: 10.1016/S0895-4356(98)00096-1

H. Haginoya and Y. Saeki, “The Usefulness of Salivary α- Amylase Activity to Evaluate Degree of Stress”, Japanese Journal of Nursing Art and Science, Vol.10, No.3, pp.19-28, 2012.

J. Kurokawa, “Evaluation by Repeated Use of Uchida- Kraepelin Psychodiagnostic Test (1st Report): Evaluation of Various Conditions by Daily Use of the Test”, Japanese Journal of occupational medicine and traumatology, Vol.60, No.2, pp.74-90, 2012.

C. Fukatsu, “Psychological tests for psychiatric care”, Psychiatria et neurologia Japonica, Vol.109, No.3, pp.282-287, 2007.

F.Yamada, “EvaluationofPsychologicalStressanditsManagement (< Special Feature> Fatigue and Stress)”, Society of Biomechanisms Japan, Vol.21, No.2, pp.69-74, 1997.

R. Hosaka and A. Watanabe, “An Approach to the Evaluation of Arousal Level by Blinking Interval Analysis”, Japan Ergonomics Society, Vol.19, No.3, pp.161-167, 1983. DOI: 10.5100/jje.19.161

H. Kawaguchi, “Investigation of the Relationship between Attention and Blocking Phenomena during Uchida- Kraepelin Test”, The Visualization Society of Japan, Vol.34, No.133, pp.8-13, 2014. DOI: 10.3154/jvs.34.8

T. Bookstore Editorial Department, “Job Aptitude Test Uchida-Kraepelin Psychodiagnostic Test Complete Understanding Manual”, Tokyo, Japan, Tsuchiya Bookstore Corporation, 2008.

S. Kurihara, “Introductory statistics from testing to multivariate analysis design”, Tokyo, Japan, Ohmsha, 2011.

Y. Fukuda and R. Sakai, “A Method of Work Appraisement by Professing Equation in Production”, Journal of Japan Industrial Management Association, Vol.32, No.3, pp.188-194, 1981.

How to Cite
Nakano, S., & Kageyama, Y. (2020). Study into Relationship between Uchida–Kraepelin Psychodiagnostic Test Results and Number of Blinks. Journal of the Institute of Industrial Applications Engineers, 8(3), 89.