Four-year-old della asks her mother for a special treat every time they go to the grocery store. at first her mother granted every request, but now she does so less consistently. research suggests that della will

Research suggest that Della will: continue to ask for a treat every time she foes to the store
When the mother granted Della's every request, she created a milestone about Della's maximum reward everytime della goes to the store.
This will set Della's expectation to achieve that maximum reward everytime della is around that familiar environment