The Mediating Effects of Alexithymia, Intolerance of Uncertainty, and Anxiety on the Relationship Between Sensory Processing Differences and Restricted and Repetitive Behaviours in Autistic Adults

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Moore, H. L., Brice, S., Powell, L., Ingham, B., Freeston, M., Parr, J. R., & Rodgers, J. (2021). The Mediating Effects of Alexithymia, Intolerance of Uncertainty, and Anxiety on the Relationship Between Sensory Processing Differences and Restricted and Repetitive Behaviours in Autistic Adults. Journal of Autism and Developmental Disorders, 52(10), 4384-4396. https://doi.org/10.1007/s10803-021-05312-1

Publication date: 13 Oct 2021 Added to AutiHub: 9 Aug 2026 Type: Article Article language: English
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Authors

Publication authors
7
Publication authors identified as autistic
1 / 7 (14.3%)
  1. Heather L. Moore
  2. Samuel Brice
  3. Lauren Powell *
  4. Barry Ingham
  1. Mark Freeston
  2. Jeremy R. Parr
  3. Jacqui Rodgers

Abstract

Abstract Distress caused by sensory processing differences for autistic individuals may be reduced by repetitive behaviours (RRB), including repetitive motor (RMB) and insistence on sameness (ISB) behaviours. Intolerance of uncertainty (IU) and anxiety mediate the relationship between sensory processing and RRB in autistic children. We replicated this model in autistic adults, extending it to include alexithymia. Serial mediation, using data from 426 autistic adults, identified significant direct effects from sensory processing to RMB and ISB, and indirect effects through alexithymia-IU-anxiety for RMB, and IU alone, and alexithymia-IU for ISB. Different mechanisms may underpin RMB and ISB. Alexithymia alongside, IU and anxiety, should be considered when understanding the relationship between sensory processing and RRB, and when offering interventions to support autistic people.

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Cited references
103
Total cited references integrated for this publication.
Cited references with an identified autistic author
1 / 103 (1.0%)
Cited author occurrences identified as autistic
2 / 430 (0.5%)
Among occurrences linked to AutiHub author records: 2 / 136 (1.5%). Distinct cited authors identified as autistic: 2 / 342 (0.6%).
Cited author occurrences linked to AutiHub author records
136 / 430 (31.6%)
Distinct linked cited authors: 76 / 342 (22.2%)
Linked cited-author occurrences not identified as autistic
134 / 136 (98.5%)
Among linked cited-author occurrences only. Across all cited-author occurrences: 134 / 430 (31.2%). Distinct linked cited authors not identified as autistic: 74 / 76 (97.4%).
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