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d2-R test for Japanese adolescents: Concurrent validity with the attention deficit-hyperactivity disorder rating
Yuko Yato1, Shohei Hirose1, Philippe Wallon2
1College of Comprehensive Psychology, Ritsumeikan University, Ibaraki, Osaka, Japan.
Background:
The d2-R test is a cancellation test developed in Germany to measure concentration and attention. This study examined the validity of the d2-R test for Japanese adolescents in comparison with German standardized data.
Methods:
Japanese junior high school students (n = 121; 61 girls, 60 boys) participated in this study. The students' performance scores in the d2-R test were compared with their daily attentiveness and hyperactivity/impulsiveness assessments conducted by the teachers. The assessments were evaluated using the attention deficit-hyperactivity disorder rating scale, fourth edition (ADHD-RS)-IV. The comparison with German counterparts was also made.
Results:
Students who were rated as less attentive and more hyperactive/impulsive performed more slowly and committed more errors in the d2-R test. Although there were no sex differences in any of the d2-R parameters, male students were rated higher than female students in all of the ADHD-RS-IV scores. Japanese adolescents outscored German counterparts on speed, concentration, and carefulness.
Conclusion:
The concurrent validity of the d2-R test is confirmed. It is an appropriate index to measure the sustained and focused attention of Japanese adolescents. The present research merits attention as the first investigation of the d2-R test conducted for Japanese adolescents.
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