Sensory processing dysfunctions as expressed among children with different severities of intellectual developmental disabilities.

The team gave the Short Sensory Profile (SSP) to children with intellectual disability. They split the kids into mild, moderate, and severe–profound groups. No control group was used; they simply wanted to see if sensory problems looked different across severity levels.

Every group had sensory processing trouble, but the pattern was not the same. Mild and severe–profound ID showed the clearest, most distinct profiles. Moderate ID fell in the middle and looked less unique.

Chan et al. (2005) tried multisensory therapy for adults with developmental disabilities. The therapy lifted mood but did not cut aggression or stereotypy. Their result seems to clash with Batya et al.: if sensory issues are so common, why didn’t fixing them change behavior? The difference is method—Sally used an adult RCT while Batya only profiled children; therapy may need to target the exact sensory pattern shown in Batya’s data.

Koegel et al. (2014) showed that autism severity, not IQ, slows real-time word recognition. Batya flips the lens: within ID, severity still matters, but for sensory processing rather than language. Together the papers tell us that “severity” predicts different weak spots depending on the diagnosis and domain you study.

Sappok et al. (2024) built a brief emotional-development scale for adults with ID. Like Batya, they found that mild and severe ends of ID look different from the middle. Both studies push clinicians to stop treating ID as one flat group and to pick tools that capture these gradients.

You can screen for sensory issues the first day you meet a child with ID. Use the SSP right away; kids at the mild or severe–profound ends will flag the clearest needs. Match your sensory plan to that profile instead of using a one-size-fits-all room. Re-check after any big change in placement or behavior; the profile may shift as the child grows.