The occurrence of autistic children's self-stimulation as a function of familiar versus unfamiliar stimulus conditions.
Unfamiliar adults spike self-stimulation in autistic kids—keep the same therapist or pre-expose new ones to reduce stereotypy.
01Research in Context
What this study did
The team watched autistic children work with two kinds of adults. One adult had played and taught the child many times. The other adult was new.
They counted how often each child rocked, flapped, or spun objects during the sessions. They also tracked correct answers to simple tasks.
What they found
Kids stimmed more with the stranger than with the familiar adult.
Self-stimulation also grew as the session wore on. When stims went up, correct responses went down.
How this fits with other research
Charlop (1986) ran a near-copy of this study the same year. Instead of body stims, they counted echoed words. The pattern matched: unfamiliar people plus unfamiliar tasks pushed echolalia higher.
Busch et al. (2010) moved the idea into toddler FAs. They showed that unfamiliar testers can hide the true reason for problem behavior. If you swap strangers mid-assessment, you may pick the wrong intervention.
Lopata et al. (2008) looked inside the body. Saliva cortisol jumped when high-functioning kids met unfamiliar peers, even when the kids said they felt fine. The stress is real even if it doesn’t show in talk.
Why it matters
Keep the same therapist when you can. If you must switch, let the new person join a few fun sessions first. Watch for a rise in stims during long trials; it is an early sign of fatigue or stress. These small moves protect learning time and give you cleaner data.
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Before a new therapist takes over, have them play a non-demand game with the child for five minutes while the familiar therapist watches.
02At a glance
03Original abstract
The present study was conducted to determine whether certain stimulus conditions were associated with high and low rates of autistic children's self-stimulation. Six autistic boys were assessed in situations varying along three dimensions: familiarity or unfamiliarity of setting, learning task, and therapist. Each child was observed in 10 10-min stimulus conditions, and trained observers recorded the occurrence of self-stimulation within each condition. The results of a 2 x 2 x 2 ANOVA indicated that self-stimulation occurred significantly more often with an unfamiliar than with a familiar therapist. Unfamiliar versus familiar setting and task were not significant effects, and there were no significant interactions. Also, significant differences were found within each condition, with self-stimulation increasing in frequency as the sessions progressed. Finally, there was a significant and negative correlation between the occurrence of self-stimulation and correct responding. These findings suggest several treatment strategies for facilitating a generalized suppression of autistic children's self-stimulation.
Journal of autism and developmental disorders, 1986 · doi:10.1007/BF01531576