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Type of Measure: The Adult Repetitive Behaviour Questionnaire-3 (RBQ-3) is a 20-item self-report questionnaire that is based on the RBQ-2 and RBQ-2A. The RBQ-3 measures restricted and repetitive behaviours such as routines and rituals, repetitive motor behaviours, sensory interests, and repetitive actions with objects. It is suitable for adults and only accessible to those with sufficient cognitive resources and verbal ability.

The RBQ-3 is a 20-item questionnaire based on the RBQ-2. (Leekam et al., 2007) and the RBQ-2A (Barrett et al., 2015). In a study of typically developing children studied at ages 15 months at 2 years and at 6 years, the RBQ-2 showed good internal consistency (Arnott et al., 2010; Leekam et al., 2007; Uljarevic et al., 2017). Response choices are based on current behaviour (seen in the last two weeks). There are four alternative responses for each item (1: never/rarely; 2: mild/occasional; 3: marked/notable, 4. serious/severe). A Mean Total Score (score range of 1.00 to 4.00) is calculated for each individual by adding the responses for each item completed in the questionnaire and dividing by the number of questions completed by the respondent.

Target Population: Adults (18 years and older)

Measurement properties and previous use: The psychometric properties of this evaulation tool were examined among university students in the UK and adults in Australia (Barrett et al., 2015). Results from a Principle Components Analysis suggest a two-factor structure – motor behaviors (coefficient alpha = 0.79) and preference for for sameness (coefficient alpha = 0.83). The RBQ-2A is a relatively new measure, but the developers assert that the RBQ-2A is a useful self-report measure of repetitive and restrictive behaviors in adults and reportedly discriminates between adults with Autism Spectrum Disorder and neurotypical individuals.

Languages: English, as well as Chinese, German, Norwegian, Persian, Spanish and Turkish (from the website)

Authors and Citation:
(from the authors): Until specific RBQ-3 publications are available, if you publish any work using the RBQ-3 Other version please cite the following as the original source of the items (RBQ-2): Leekam, S, Tandos, J., McConachie, H., Meins, E., Parkinson, K., Wright, C.,Turner, M., Arnott, B., Vittorini, L., & LeCouteur, A. (2007). Repetitive behaviours in typically developing 2-year-olds. Journal of Child Psychology and Psychiatry, 48, 11, 1131-1138. If you publish any work using the RBQ-3 Self version, please cite the following as the original source (RBQ-2A): Barrett, S. L., Uljarević, M., Baker, E. K., Richdale, A. L., Jones, C. R. G., & Leekam, S. R. (2015). The adult repetitive behaviours questionnaire-2 (RBQ-2A): A self-report measure of restricted and repetitive behaviours. Journal of Autism and Developmental Disorders, 45(11), 3680-92. doi: 10.1007/s10803-015-2514-6

Licence: via adminsitration manual for RBQ-3 The administration manual further explains in detail, but the tools is free to use in research, may be copied and downloaded so long as providers are not charging for it, must cite the authors, the wording/layout and instructions must not be changed, it must be used in its entirety, and it does not allow for unauthorized translations.

Link to measure: RBQ-3

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