The association between environmental events and self-injurious behaviour in Cornelia de Lange syndrome.
Self-injury in Cornelia de Lange syndrome is idiosyncratically linked to specific environmental events—individual assessment is essential.
01Research in Context
What this study did
The team watched eight children who have Cornelia de Lange syndrome.
Each child wore a small wrist device that counted every hit, bite, or head-bang.
Staff wrote down what happened five minutes before each burst of self-injury.
They looked for patterns like room changes, new people, or loud noises.
What they found
Seven kids showed at least one clear trigger, but the triggers were all different.
One boy hurt himself only when the hallway got noisy.
A girl bit her hand right after lunch ended.
Because every pattern was unique, the authors could not write one general rule.
How this fits with other research
O'Reilly (1996) first showed that rare events like respite care can set off episodic self-injury.
Symons et al. (2005) widened the lens and found the same idea inside CdLS, proving the rule holds across syndromes.
Fabbretti et al. (1997) proved that even a wheelchair can act as a trigger; the new data say the trigger can be anything, so you must test each child.
Early et al. (2012) surveyed kids with autism and found self-injury linked to low ability and mood; Symons et al. (2005) say ability level alone won’t predict the behavior in CdLS—look at the moment-by-moment environment instead.
Why it matters
You cannot assume all CdLS clients will react to the same setting.
Run a brief ABC log for each child before you write the behavior plan.
When you spot a personal trigger, remove or soften it first; that may cut injury by half without any other treatment.
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02At a glance
03Original abstract
BACKGROUND: There has been limited empirical research into the environmental causes of self-injury in Cornelia de Lange syndrome. The present study examined the variability of self-injurious behaviour in Cornelia de Lange syndrome across environmental setting events. Additionally, the association between setting events and more specific environmental events was examined. METHOD: A descriptive analysis of observational data on eight children with Cornelia de Lange syndrome aged between 4 and 14 years was carried out. The association between self-injurious behaviour and four environmental setting events and between specific environmental events and setting events was examined using established statistical methods for observational data. RESULTS: Seven out of eight of the participants showed at least one form of self-injurious behaviour that was associated with a particular setting event. The study also demonstrated that the relationship between setting events and environmental events is extremely variable across individuals. CONCLUSIONS: Self-injurious behaviour in some individuals with Cornelia de Lange syndrome is associated with environmental events although the precise nature of the association warrants clarification. Using broad setting events as a methodological tool in isolation provides some insight into the role of specific environmental factors in maintaining self-injurious behaviour but the integrity of setting events must be established.
Journal of intellectual disability research : JIDR, 2005 · doi:10.1111/j.1365-2788.2005.00649.x