Abstract
Background: Hyperactivity and repetitive behaviour are characteristic features of fragile X syndrome (FXS). However, little is known about the influence of autism symptomatology on how these characteristics develop over time. We investigate the profiles and developmental trajectories of overactivity, impulsivity and repetitive behaviour, in males with FXS over three time points spanning 8 years. Method: Participants formed two subgroups, those who displayed elevated symptoms of autism at Time 1 (n = 37; Mage = 16.32; age range = 6.61-43.51) and those who did not (n = 32; Mage = 8.43; age range = 8.94-47.49). Results: Participants without elevated symptoms of autism showed a reduction in impulsivity and repetitive questioning over time, whereas those with elevated symptoms of autism did not. Differences between the two subgroups in several topographies of repetitive behaviour emerged at Time 3 only. Conclusions: These results further understanding of the relationship between autistic phenomenology and behavioural characteristics in FXS.
| Original language | English |
|---|---|
| Journal | Journal of Intellectual Disability Research |
| Early online date | 3 May 2018 |
| DOIs | |
| Publication status | E-pub ahead of print - 3 May 2018 |
Keywords
- Attention deficit hyperactivity disorder
- Autism
- Developmental trajectory
- Fragile X syndrome
- Repetitive behaviour
ASJC Scopus subject areas
- Rehabilitation
- Arts and Humanities (miscellaneous)
- Neurology
- Clinical Neurology
- Psychiatry and Mental health
Access to Document
- Crawford_Overactivity_impulsivity_Journal_of_Intellectualy_Disability_Research_2018
"This is the peer reviewed version of the following article: Crawford et al, Overactivity, impulsivity and repetitive behaviour in males with fragile X syndrome: contrasting developmental trajectories in those with and without elevated autism symptoms, Journal of Intellectual Disability Research , which has been published in final form at https://doi.org/10.1111/jir.12488. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."