Assessment and treatment of problem behavior occasioned by variable‐sequence transitions for children with autism

Leon and team worked with three boys with autism, in a clinic room. They looked at two kinds of transitions: fixed order (puzzle → blocks → trains every time) and variable order (the same tasks but shuffled).

During variable transitions, staff gave a 30-second heads-up: a bell plus a picture card showing the next toy. They measured hitting, screaming, and flopping. A multiple-baseline design across kids let them test cause and effect.

When the toy order changed without warning, problem behavior jumped for all three boys. Adding the bell-and-card cue cut the behavior almost to zero for two boys and halved it for the third.

Fixed sequences stayed calm even without cues, showing the danger was the surprise, not the switch itself.

Orsmond et al. (2009) already showed that tweaking the whole transition context can wipe out problem behavior. Leon narrows the fix to one cheap cue, making the older finding easier to use.

Planer et al. (2018) also played with sequence order, but for high-pro requests, not transitions. Both studies find that mixing the order matters—kids with autism notice the pattern change.

Dugdale et al. (2000) taught teens to be more random on purpose. Leon flips the coin: variability can be stressful when it is outside the child’s control, so adults should signal it.

You can’t always run the same schedule, but you can kill the surprise. Keep a kitchen timer and a small photo deck in your pocket. Thirty seconds before any change, ring and show the next item. No extra staff, no fancy tech—just one consistent cue that tells the learner, “New thing coming, you’re safe.” Try it during circle-time rotations, center switches, or therapy room clean-up and watch the flare-ups fade.