Relationships between psychosocial aspects of stuttering and self-disclosure of stuttering in a Japanese sample

Authors

• Daichi Iimura, University of Tsukuba
• Saburo Takahashi, Tokyo Gakugei University
• Mizuki Aoki, University of Tsukuba
• Kentaro Yoshizawa, Prefectural University of Hiroshima
• Kota Yanai, University of Tsukuba
• Shoko Miyamoto, University of Tsukuba
• Michael P. Boyle, Montclair State UniversityFollow

Document Type

Article

Publication Date

9-2026

Journal / Book Title

Journal of Fluency Disorders

Abstract

Purpose We aimed to psychometrically evaluate a Japanese version of the Disclosure of Stuttering Scale, from Boyle et al. (2018), and identify the psychosocial factors associated with level of stuttering self-disclosure among adults who stutter.

Methods: Adults who stutter were recruited via stuttering self-help groups in Japan and the authors’ contacts. Participants completed their demographics, the Disclosure of Stuttering Scale and other psychological scales assessing affective, cognitive, and social aspects of stuttering via an online survey. We analyzed 180 participants after those with unreliable or duplicate responses were excluded. The scale’s reliability and validity were confirmed, and multiple linear regression analysis was conducted to predict the score of the Disclosure of Stuttering Scale using demographic variables and psychological measures.

Results: The Japanese Disclosure of Stuttering Scale had good internal consistency (ω =.832) and test–retest reliability (intraclass correlation coefficient =.808), with no obvious ceiling or floor effects. Level of self-disclosure of stuttering was lower in the Japanese sample than in the United States sample (Cohen’s d = 0.55) reported by Boyle et al. (2018). The regression model revealed that self-reported male gender, self-help group experience, higher self-acceptance, and lower self-stigma were associated with a higher self-disclosure level (adjusted R² =.347).

Conclusion: Our study indicated that self-reported gender and psychological and social (self-help experience) components were associated with the level of self-disclosure of stuttering. Furthermore, Japanese adults who stutter tended to report lower levels of self-disclosure compared to previous samples, which may reflect sociocultural differences.

DOI

10.1016/j.jfludis.2026.10623

Rights

© 2026 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Montclair State University Digital Commons Citation

Iimura, Daichi; Takahashi, Saburo; Aoki, Mizuki; Yoshizawa, Kentaro; Yanai, Kota; Miyamoto, Shoko; and Boyle, Michael P., "Relationships between psychosocial aspects of stuttering and self-disclosure of stuttering in a Japanese sample" (2026). Department of Communication Sciences and Disorders Faculty Scholarship and Creative Works. 203.
https://digitalcommons.montclair.edu/communcsci-disorders-facpubs/203

Published Citation

Iimura, Daichi, et al. “Relationships between Psychosocial Aspects of Stuttering and Self-Disclosure of Stuttering in a Japanese Sample.” Journal of Fluency Disorders, vol. 89, Sept. 2026, p. 106233. https://doi.org/10.1016/j.jfludis.2026.106233.