Background: Secondary behaviours, which encompass reactions developed due to an individual's fear and stress about stuttering, have the potential to exacerbate the condition. Therefore, self-evaluation of secondary behaviours is significant in the multidimensional approach for people who stutter (PWS). Aim: To determine the validity and reliability of the Revised Scale of Avoidance and Struggle Behaviours in Stuttering (r-SASBS). Methods & Procedures: The results of the item analysis and content validity of the Scale of Avoidance and Struggle Behaviours in Stuttering (SASBS), whose pilot study was completed, were reviewed and the number of items was reduced from 30 to 16. The r-SASBS was administered to 440 participants (PWS = 365; people who did not stutter = 75). The content, construct, discriminant validity, internal consistency and test-retest reliability of the r-SASBS were analysed. Outcomes & Results: Content validity was analysed quantitatively based on expert opinions and was found to be high. The r-SASBS had two factors based on exploratory factor analysis. The number of items was reduced to 14 using confirmatory factor analysis. With discriminant validity, it was found that the r-SASBS could distinguish between the groups. The internal consistency and reliability of the test-retest scores were found to be high. Conclusions & Implication: These findings indicated that the r-SASBS is a reliable and valid scale for the self-evaluation of secondary behaviours in PWS. Thus, it can be used by speech-language pathologists for the multidimensional assessment of stuttering. The validity and reliability of the r-SASBS should be investigated in school-aged children who stutter.