Tactile defensiveness in children with developmental disabilities: responsiveness and habituation.
Touch-defensive kids feel each touch more, but they do not habituate—so plan for ongoing sensitivity, not fading.
01Research in Context
What this study did
The team looked at how kids with developmental delays react to touch.
They wanted to know if highly touch-sensitive children get used to gentle touch over time.
Each child got light touches on the arm while the researchers watched for flinches, pulls, or signs of upset.
What they found
Kids who were more touch-defensive reacted stronger to every touch.
Surprise: these kids did not calm down with repeated touches.
The data did not show a clear habituation pattern, so an “inhibition problem” could not be blamed.
How this fits with other research
Emerson et al. (2007) saw the opposite mood: their autistic kids with ID smiled and moved toward tactile toys.
The two studies seem to clash, but the kids and the emotions measured were different—one group was defensive, the other was delighted.
Eussen et al. (2016) later showed that autistic adults rate the same surface as rougher from one trial to the next.
That trial-to-trial jump supports T et al.’s point: expect noisy, inconsistent touch reports in people with sensory over-responsivity.
Early et al. (2012) found that autistic children can stop a prepotent response just fine, backing T et al.’s caution—no blanket “inhibition deficit” should be assumed.
Why it matters
When a learner pulls away from glue, sand, or clothing tags, do not assume they will “get used to it” after a few exposures.
Probe for preferences instead: some kids avoid touch, others seek it.
Track trial-by-trial data; wide swings are part of the profile, not measurement error.
Use this info to write realistic sensory goals and to pick reinforcers that feel good to the child.
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02At a glance
03Original abstract
Tactile defensiveness (TD) is characterized by behaviors such as rubbing, scratching, negative expressions, withdrawal, or avoidance in response to tactile stimulation. An inhibition deficit has been implied in the literature and is the focus of this study. School-aged children with developmental disabilities were first assessed for level of TD using three measures. Later, the children were presented with a repeated tactile stimulus while engaged in a computer game. Intensity, duration, and latency of the responses were recorded on each trial. It was hypothesized that higher levels of TD would be associated with (a) greater responsiveness and (b) slower habituation rates to the tactile stimulus. Correlations of three separate TD measures and a series of 3 x 10 (Level of TD by Responsiveness across trials) repeated measures ANOVAs were used to test the two hypotheses. Children who demonstrated higher levels of TD on some of the preliminary measures also showed higher responsiveness in the experimental situation. There was no general habituation effect, and the limited group by trials interactions were not interpretable. We conclude that there is evidence for a differential sensitivity in TD, but not an inhibition deficit. Another significant finding included a negative correlation between TD and developmental age.
Journal of autism and developmental disorders, 1994 · doi:10.1007/BF02172128