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As she is presenting her daughter, Millie, with food at dinner each night, her mother says, “You need to eat your vegetables if you want to have dessert.” Millie’s mother finds that, on most nights, Millie cries and complains about eating her vegetables, takes a long time to eat them, and sometimes does not eat them at all. However, on Friday, Millie always quickly eats her vegetables and does not complain. Millie loves peach cobbler, and this is available for dessert only on Friday. The restriction of peach cobbler for dessert except for on Friday, making it more likely that Millie will eat her vegetables to get dessert, might be considered to be an example of this principle of applied behavior analysis.
What is motivating or establishing operation?