Warren has earned himself a reputation for being the class clown. His teacher, Ms. Washington, used to laugh at Warren’s funny remarks but is now trying to discourage Warren’s disruptive behavior by ignoring his jokes. In spite of Ms. Washington’s attempts to ignore Warren, Warren sometimes tells a joke so funny that Ms. Washington laughs in spite of herself. Rather than decreasing his joke telling, Warren begins telling even more outrageous jokes. Inadvertently, Ms. Washington is modifying Warren’s joke-telling behavior through: