Janey's mom is still using the shoes that kindly Aunt Agatha gave to Janey when she was 6 months old. Janey has grown quite a bit since then and now the shoes pinch her feet. One day when her mom puts the shoes on Janey, Janey begins to cry and point at her feet. Her mom removes the shoes and Janey stops crying. This happens a couple of times more. Now whenever Janey sees the shoes, she begins to cry and point at her feet. Her mom promptly removes the shoes from Janey's view and, when she does this, Janey stops crying. The mom stops showing the shoes to Janey. If Janey's crying and pointing at her feet is the response, and she continues to do so, then the best label for the effect is: