Alternative Method for Scoring Repetitive Behavior Scale—Revised Version
(2005)
Based on Doctoral Dissertation of Kristen S.L. Lam
The scoring form that follows is based on the doctoral research of Kristen S.L. Lam. Dr. Lam gathered data on the Repetitive Behavior Scale—Revised from the care providers (mostly parents and guardians) of 320 individuals having autism spectrum disorders who were members of the Autism Society of South Carolina. Dr. Lam derived an empirical five-factor solution using factor analysis. She used an Ordinary Least Squares discrepancy function in Comprehensive Exploratory Factor Analysis with oblique quartimax rotation.
The scoring form based on this analysis appears on the following page. As scientific papers are published based on this work, the references will be added to this page. Workers wishing to use this scoring algorithm are welcome to copy the scoring form. We ask that they acknowledge Dr. Lam’s dissertation and/or relevant publications when reporting this work.
REFERENCES
Lam, K.S.L. (2004). The Repetitive Behavior Rating Scale – Revised: Independent validation and the effects of subject variables. Unpublished doctoral dissertation, The Ohio State University, Columbus.
Lam, K.S.L.,& Aman, M.G. “The Repetitive Behavior Rating Scale – Revised: Independent validation and the effects of subject variables.” Poster presented at Thirty-eighth Annual Meeting of the Gatlinburg Conference on Research and Theory in Intellectual and Developmental Disabilities, Annapolis, MD, March 17-19, 2005.
Further information can be obtained about the research leading to this scoring method from:
Dr. Kristen S.L. Lam:
or
Dr. Michael G. Aman:
Subject Initials/ID Number ______/ ______Date ____ / __ __ / __ __ Visit _____ Completed by (Initials) ______
Scoring Supplement for the Repetitive Behavior Scale—Revised
The following is an alternative 5-subscale scoring solution for the RBS-R as detailed by:
Lam, K.S.L. (2004). The Repetitive Behavior Scale—Revised: Independent validation and the effects of subject variables. Unpublished doctoral dissertation, The Ohio State University, Columbus.
INSTRUCTIONS: Please fill in score (0 to 3) endorsed for each corresponding question on the RBS—R (e.g., “1” refers to question number 1 on the RBS—R). Note: several items on the RBS-R are not included in this scoring algorithm.
After filling in the ratings, sum each column to obtain a subscale score. Then, count the number of items endorsed for each subscale (any rating other than zero). Last, total the subscale scores and endorsement scores.
I: Stereotypic Behavior Subscale / II: Self-Injurious Behavior Subscale / III: Compulsive Behavior Subscale / IV:Ritualistic/Sameness Behavior Subscale / V: Restricted Interests Subscale1. ______/ 7. ______/ 15. ______/ 26. ______/ 36. ______
2. ______/ 8. ______/ 16. ______/ 27. ______/ 40. ______
3. ______/ 9. ______/ 17. ______/ 28. ______/ 41. ______
4. ______/ 10. ______/ 18. ______/ 30. ______
5. ______/ 11. ______/ 19. ______/ 31. ______
6. ______/ 12. ______/ 20. ______/ 32. ______
22. ______/ 13. ______/ 33. ______
42. ______/ 14. ______/ 34. ______
43. ______/ 35. ______
37. ______
38. ______
39. ______
Subscale I Score: ______
(sum of the above ratings) / Subscale II Score: ______
(sum of the above ratings) / Subscale III Score: ______
(sum of the above ratings) / Subscale IV Score: ______
(sum of the above ratings) / Subscale V Score: ______
(sum of the above ratings)
Number endorsed:
______ / Number endorsed:
______ / Number endorsed:
______ / Number endorsed:
______ / Number endorsed:
______
Total Score (sum of all five subscale scores):
______
Total Number Endorsed (sum of all five subscales numbers endorsed):
______
Global Rating Score (Parent Global Impression, 1-100, page 7 of RBS-R)
______