Final answer:
A good antecedent intervention for Evi's screaming for his helicopter toy is teaching alternative communication skills, establishing and communicating clear routines and expectations, and using positive reinforcement such as promising playtime with the toy when Evi asks appropriately.
Step-by-step explanation:
An effective antecedent intervention to address the behavior of Evi screaming for his helicopter toy might involve implementing a strategy that focuses on teaching alternative communication skills. For instance, you could teach Evi to use a specific phrase or action, like raising his hand or using a picture card, when he wants to play with his helicopter. Additionally, setting clear expectations and communicating these to Evi can help reduce the likelihood of screaming. For example, you might establish a routine that Evi gets to play with the helicopter at certain times of the day or after certain tasks are completed, making it clear that screaming is not an effective way to get the toy.
Moreover, remembering how well Evi holds to promises could be utilized in making an agreement or setting rules about when and how to play with the toy. Making a game of flying the kite and pretending could also be shifted into a form of positive reinforcement, rewarding Evi when he asks for the toy appropriately rather than through screaming. By consistently reinforcing the desired behavior and providing clear expectations, screaming can be reduced as Evi learns more appropriate ways to communicate his desires.