Answer:
The correct answer is option a. the partial-reinforcement extinction effect
Explanation:
The partial-reinforcement extinction effect (PREE) supports the idea that the process of learning under partial reinforcements is more robust as compared to learning under complete reinforcements. This was proved through several experiments that were carried out to analyse the durability of behavior under both circumstances.
In the above question, the decision of Sandra for rewarding her son only sometimes for going to the toilet is owed to partial reinforcement extinction effect.