Autism during infancy: a retrospective video analysis of sensory-motor and social behaviors at 9-12 months of age.
Nine easy sensory-motor and social signs spotted on 10-minute baby videos predict later autism with 94 % accuracy.
01Research in Context
What this study did
Researchers watched 10-minute home videos of babies aged 9-12 months. They used a 9-item checklist that mixed social and sensory-motor signs. Later they checked which children got diagnoses of autism, general delay, or typical development.
The team wanted to see if tiny, easy-to-spot actions caught on film could predict later diagnosis.
What they found
The short checklist correctly sorted almost 94 % of the babies into the right group. Key flags were poor sensory modulation, stiff or odd posture, and repeated body movements. Social misses like no response to name added power.
How this fits with other research
Rojahn et al. (1994) did a similar study with first-birthday videos. They used only four social items and hit 91 % accuracy. Baranek (1999) adds sensory-motor items and pushes accuracy a bit higher, showing that movement and sensory signs matter too.
Veness et al. (2012) moved the idea forward. They tracked babies to 24 months and found gesture deficits stayed the strongest clue. Their study was prospective, not retrospective, so the sensory-motor markers hold up in real time.
Gordon et al. (2015) counted gestures at 13-15 months and linked them to later language. Their home-style clips mirror the Baranek (1999) coding style and back up the value of early movement checks.
Bedford et al. (2012) looked at gaze following and found no group difference in success, but less looking time at targets. This seems to clash with T’s strong classification. The gap is about method: eye-tracking lab tasks catch subtle attention, while home videos catch broad, obvious actions. Both views help; they measure different layers of the same risk.
Why it matters
You can add a quick sensory-motor scan to any infant screening. While watching a home clip or during an intake, note floppy or stiff posture, hand flaps, and how the baby calms to sound. Pair these with classic social checks like name response. This nine-item list gives you a free, fast tool that is as accurate as longer scales. Use it to decide who needs a full autism evaluation and to start parent education early.
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02At a glance
03Original abstract
This retrospective video study explored the usefulness of sensory-motor measures in addition to social behaviors as early predictors of autism during infancy. Three groups included 11 children with autism, 10 with developmental disabilities, and 11 typically developing children. Home videos were edited to obtain a 10-minute cross-section of situations at 9-12 months for each subjects. Using interval scoring, raters coded several behavioral categories (i.e., Looking, Affect, Response to Name, Anticipatory Postures, Motor/Object Stereotypies, Social Touch, Sensory Modulation). Nine items, in combination, were found to discriminate the three groups with a correct classification rate of 93.75%. These findings indicate that subtle symptoms of autism are present at 9-12 months, and suggest that early assessment procedures need to consider sensory processing/sensory-motor functions in addition to social responses during infancy. Furthermore, prior to a time that they reported autistic symptoms, caregivers used compensatory strategies to increase the saliency of stimuli in order to engage their children more successfully; these strategies may provide a window for earlier diagnosis.
Journal of autism and developmental disorders, 1999 · doi:10.1023/a:1023080005650