Melanie and I are playing with blocks and each have our own…

Melanie and I are playing with blocks and each have our own block towers. I realize it’s time for dinner and tell her she needs to clean up her block tower. She tells me “No!” and throws her blocks across the room. As a consequence, I tell her she has to clean up her blocks and clean up my pile of blocks. In the future, she’s less likely to throw her blocks across the room when I tell her it’s time the clean up. This is an example of