The impact of atypical sensory processing on adaptive functioning within and beyond autism: The role of familial factors.
Only sensory seeking behaviors in autistic clients predict poorer adaptive skills once family factors are removed.
01Research in Context
What this study did
The team looked at twins and siblings. Some had autism. Some did not.
They asked parents to fill out forms about each child’s senses and daily skills.
Then they used math to see if sensory quirks hurt daily skills, or if the link came from shared family genes.
What they found
Kids who hated loud lights or tags did have weaker daily skills at first.
When the team counted family factors, that link vanished. It was a family effect, not a direct effect.
Only one sensory quirk still mattered for autistic kids: seeking smells, spins, or shiny things. That habit still predicted lower daily living scores.
How this fits with other research
Chezan et al. (2019) also saw that high sensory avoiding hurt school and play skills. Their small pilot lacked family controls, so it looked like avoiding caused the drop. The twin data now show the drop is better explained by shared family risk.
Dellapiazza et al. (2020) found sensory issues in almost 90 % of autistic kids and linked them to weaker adaptive scores. Their big cohort could not rule out family genes. The twin paper adds a causal lens: the link shrinks when family is held constant.
Lim et al. (2016) carved kids into sensory sub-types and saw the "attenuated-preoccupied" group fall furthest on daily skills. The new work says that fall may ride on family traits, not on the sensory label itself.
Why it matters
When you see an autistic client who craves swings, lights, or textures, treat that seeking as a live target. It is the one sensory pattern that still predicts stalled adaptive gains even after family influences are stripped out. Pair sensory-reduction plans with daily-living goals. Do not assume every sensory dislike needs direct treatment; some may be family-linked noise rather than a true barrier.
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02At a glance
03Original abstract
Individuals diagnosed with autism tend to process sensory information differently than individuals without autism, resulting for instance in increased sensitivity to sounds or smells. This leads to challenges in everyday life and may restrict the individual's daily functioning. How direct this link is, however, is currently unclear. We investigated this question in 289 twins of whom 60 were diagnosed with autism and further 61 were diagnosed with other neurodevelopmental disorders. We looked at the association between unusual sensory processing and adaptive skills, both across individuals and within-twin pairs, testing whether individuals with higher levels of atypical sensory processing showed reduced adaptive skills compared to their twins. Since twins share 50%-100% of their genes and part of their environment (e.g. family background), associations within-twin pairs are free from effects of these familial factors. We found that an increased sensitivity to, as well as the avoiding of, sensory input (hyper-responsiveness) was linked to reduced adaptive skills across individuals-but not within-twin pairs. We also found an association between the degree to which individuals seek for sensory input (sensation seeking) and reduced adaptive skills, but only in individuals diagnosed with autism. The results suggest that sensory hyper-responsiveness has negative effects on individuals' general ability to function, but that this link is influenced by familial factors and hence not direct. In addition, sensation seeking behaviors might have a negative impact on adaptive skills specifically in autistic individuals.
Autism : the international journal of research and practice, 2021 · doi:10.1177/13623613211019852