Some effects of immediacy on healthy food selection
A 30-60 s delay to junk-food snacks quickly moves kids with autism to choose fruit instead.
01Research in Context
What this study did
Three kids with autism, picked snacks during free-play. Each child had two bins: cookies now or apple slices now.
The team then added a twist. If the child pointed to cookies, they waited 30-60 s before getting them. Apple slices still arrived right away.
Sessions ran 5-10 min, three days a week. The researchers counted how many times each snack was chosen.
What they found
When cookies cost extra waiting, every child started picking apples more. Apple choices jumped from 20-40 % to 80-100 %.
The switch happened fast—within the first delay session—and stayed high while the delay stayed in place.
How this fits with other research
Dowdy et al. (2018) also used edibles to change behavior, but they gave treats right away for nail-cutting compliance. McNellis shows the opposite move—delaying the treat—can be just as powerful.
MWFaught et al. (2021) gave us a quick screener for feeding problems in autism. Their tool spots kids who avoid fruit; McNellis offers a simple fix once the problem is found.
Popple et al. (2016) improved daily living with video modeling. McNellis adds a lower-tech option: just wait half a minute before handing over the junk food.
Why it matters
You don’t need fancy toys or strict extinction to boost healthy eating. A short wait timer on the less-healthy snack is enough. Try it at snack time, lunch, or during food preference assessments. Set a 30 s visual timer; deliver fruit right away if chosen. One small delay can tip the scale toward better nutrition.
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02At a glance
03Original abstract
Children on the autism spectrum tend to consume fewer healthy foods than typically developing children. Given the negative effects of unhealthy eating, it is important to increase healthy food selection. The current study examined whether manipulating the delay to reinforcement would increase healthy food selection in a concurrent-operants assessment. During the concurrent-operants assessment, participants chose between a snack and a fruit and the researchers systematically added a delay to the snack to switch the allocation of responding from the snack to the fruit. The results showed that one participant's response allocation switched from the snack to the fruit at a delay of 30 s and two participants' response allocation switched at the 60-s delay. This suggests that manipulating the delay to reinforcement may increase healthy food selection for some children on the autism spectrum.
Journal of Applied Behavior Analysis, 2025 · doi:10.1002/jaba.70014