Examining Treatment Outcomes Across Contexts: How Do Child Baseline Characteristics Impact Measurement of Treatment Response?
Rebecca Grzadzinski, Alapika Jatkar, Kevin Donovan and 4 others
PMID 35969334WHAT IT FOUND
Baseline age and IQ predicted social communication improvement in toddlers with autism, but not restricted behaviors.
Scores from parent-child play and clinician interactions matched for social outcomes but diverged for repetitive behaviors, suggesting the context of assessment changes how a child's progress is measured.
Key findings
01Higher baseline verbal and nonverbal IQ and younger age were associated with greater improvement in social communication symptoms, regardless of whether the measure was a parent-child play session or a clinician interaction.
02Consistency between the two measurement contexts was good for social communication but poor for restricted and repetitive behaviors, indicating that the type of interaction influences the observed outcome for these specific symptoms.
03Baseline severity of restricted and repetitive behaviors predicted social communication change on the clinician-administered measure but not on the parent-child measure, showing that child characteristics interact with the assessment context.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample size of 49 is too small for robust statistical modeling of multiple variables, and the clustering method used may have identified patterns that do not hold in larger groups. The children came from multiple different intervention trials with varying treatments, intensities, and providers, so the study cannot say how much of the change was due to the specific therapy versus the child's own baseline traits. The study did not measure other known predictors of outcome, such as sensory processing differences or caregiver responsiveness, which could explain some of the variability in results.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not assume that a child's lack of progress in repetitive behaviors during a structured test means they are not improving in daily life. The study found that these two measures often disagree, and a child might show change in one context but not the other.