Using negative reinforcement to increase self-feeding in a child with food selectivity.

One preschooler with cerebral palsy and food selectivity ate only one to three bites per meal. The team set a changing bite target each day. If the child hit the target, he could leave the table right away. Leaving was the negative reinforcement — escape from the meal.

The design is called changing criterion. Each session the bite goal moved up by one. The study ran in a clinic room with the usual lunch foods.

Bites jumped from one–three at baseline to fourteen, beating the final mastery mark. Problem behavior stayed low. The child met every new bite goal within one or two meals.

Scott et al. (2024) pooled the kids and found escape-plus-non-escape mixes work best. The single-case here shows the pure negative-reinforcement exit still works, just a hair slower than the combo package.

Richman et al. (2001) and Swaim et al. (2001) used escape extinction plus praise or toys. They kept kids seated the full 15 min. This 2011 paper flips the rule: finish your bites and you’re free. Both styles raise acceptance, so you can pick the one caregivers will actually stick with.

Rubio et al. (2020) added a finger prompt when spoon-only extinction failed. The exit-criterion tweak in the 2011 study offers a different add-on if you want to avoid extra physical guidance.

You now have a simple lever: let the child leave after a set number of bites. No extra toys, no long chair holds. Start with a bite count the client can already do, then raise it daily. Watch for escape bursts on the first tougher days; stay firm and the jump in acceptance usually shows within a week. Perfect for clinics, day programs, or even home meals where parents want a clear finish line.