A study of behaviour profiles among intellectually disabled people in residential care in Hungary.
Lower IQ means stronger stereotypy in Hungarian ID homes—so target your scarce resources to the lowest-functioning residents first.
01Research in Context
What this study did
Janos and colleagues visited every large state home for adults with intellectual disability in Hungary.
They gave the Behavior Problems Inventory to 269 residents and recorded each person’s IQ score.
The team wanted to know if lower IQ is linked to more severe behavior issues.
What they found
Three out of four residents showed some form of challenging behavior.
Stereotypy—like hand-flapping or rocking—was the standout.
The lower the IQ, the worse the stereotypy; the link was steady, not jumpy.
How this fits with other research
Gerber et al. (2011) pulled earlier papers and found that pain, poor sleep, and vision trouble also feed challenging behavior.
Janos adds a new layer: even after you rule those out, IQ level still predicts stereotypy.
van Timmeren et al. (2016) later showed Dutch homes already give more staff hours to profound-ID clients—exactly the group Janos flagged as highest risk.
Weiss et al. (2001) proved that outdoor time can cut stereotypy in the moment; Janos says you should aim that fix at the lowest-IQ residents first.
Why it matters
If you assess an adult with profound ID, expect high stereotypy and plan extra data sheets.
Pair Janos’s IQ rule with F et al.’s medical screen: check eyes, sleep, and pain, then still keep stereotypy goals on the plan.
Use A et al.’s lesson—ask for more staffing or outdoor sessions for the lowest-functioning clients; the risk is real and the fix is known.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Pull the IQ scores on your caseload and move the lowest-scoring clients to the top of your stereotypy-assessment list.
02At a glance
03Original abstract
The authors investigated the behavioural dimensions of 269 intellectually disabled (ID) people in residential care in specialized institutions in Tolna county (South-West Hungary) with the aim of screening the frequency and severity of the relevant behavioural symptoms associated with intellectual disability and depending on the level of intellectual impairment. Only 120 residents had an International Classification of Disease (ICD) diagnosis of "mental retardation (MR)" and a valid IQ grading either by means of the Hungarian standard version of the HAWIK or by the coloured Raven test. 4 IQ groups were created: borderline (B), mild (MID), moderate (MOD) and profound (PID) intellectual disability subgroups. The Hungarian pilot version of the Behaviour Problem Inventory (BPI) was used. seventy-two percent of the residents displayed behavioural problems. All scale score means exhibited an enhancing tendency with IQ loss, as both frequency and Seventy increased linearly towards the more severe groups, but significantly only in the category of stereotyped behaviour. The authors focussed on problems of patient recruitment and discussed the measurement of behavioural and other psychiatric symptoms when researchers reported on the increased occurrence of behaviour and psychiatric symptoms in ID populations.
Research in developmental disabilities, 2011 · doi:10.1016/j.ridd.2011.03.003