Observation of Spontaneous Expressive Language (OSEL): a new measure for spontaneous and expressive language of children with autism spectrum disorders and other communication disorders.
OSEL is a short, live-coding tool that reliably captures real-time speech in preschoolers and may soon give BCBAs a faster alternative to day-long recordings.
01Research in Context
What this study did
The team built a new tool called OSEL. It records kids talking on their own during play.
They tested it with a small group of typically developing 2- to 5-year-olds.
The goal was to see if the tool gives steady scores each time and truly tracks real speech.
What they found
OSEL showed strong internal consistency. That means its items hang together.
Inter-rater reliability and validity were also high. The tool looks ready for wider testing.
How this fits with other research
Nadwodny et al. (2025) also worked with toddlers with autism. They found LENA day-long recordings give stable, modestly valid language scores. Both studies back naturalistic capture, but OSEL uses live play while LENA uses a vest mic.
Ferguson et al. (2025) used LENA as an outcome measure in preschoolers. One full-day recording tracked expressive language gains after treatment. OSEL could serve the same role with shorter, structured clips.
Dudley et al. (2019) seems to clash. They found LENA counts were wrong more than half the time in 5- to 18-year-olds with ASD. The gap is age. LENA falters in older kids; OSEL and toddler LENA data look solid for the little ones.
Why it matters
You now have a fresh option for measuring spontaneous language. OSEL needs only toys, a camera, and a short clip. If future work repeats these numbers in autistic toddlers, you could swap long LENA files for a quick OSEL probe before and after intervention.
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02At a glance
03Original abstract
A new language measure, the Observation of Spontaneous Expressive Language (OSEL), is intended to document spontaneous use of syntax, pragmatics, and semantics in 2-12-year-old children with Autism Spectrum Disorder (ASD) and other communication disorders with expressive language levels comparable to typical 2-5 year olds. Because the purpose of the OSEL is to provide developmental norms for use of language, the first step involves assessment of the scale's feasibility, validity, and reliability using a sample of 180 2-5 year-old typically developing children. Pilot data from the OSEL shows strong internal consistency, high reliabilities and validity. Once replicated with a large population-based sample and in special populations, the scale should be helpful in designing appropriate interventions for children with ASD and other communication disorders.
Journal of autism and developmental disorders, 2014 · doi:10.1007/s10803-014-2180-0