Final answer:
In a behavior intervention plan, both the function of the behavior and the replacement behavior should be included for every target behavior to ensure a comprehensive and tailored approach to behavior modification.
Step-by-step explanation:
For every target behavior listed within a behavior intervention plan, both the function of the behavior and the replacement behavior should be specified. The function refers to the reason why an individual is exhibiting a particular behavior, which is critical to understanding the behavior itself. On the other hand, the replacement behavior is a behavior that is taught and encouraged as a substitute for the problem behavior. It must serve the same function for the individual but be more appropriate or socially acceptable.
Identifying both the function and the replacement behavior ensures that the intervention strategy is comprehensive and tailored to address the specific needs of the individual, thereby increasing the likelihood of success in modifying the target behavior.