Answer:
The strategy is to Incorporate a variety of relevant stimulus situations in training.
Explanation:
The strategy Mathew's baseball coach is using is to Incorporate a variety of relevant stimulus situations in training.
With this training, Mathew's stimuli response during a game is going to be according to stimuli situations he received in training. The coach is using a strategy for promoting generalization training using sufficient stimulus exemplars. If Mathew is trained to respond correctly to a range of relevant stimulus situations (stimulus exemplars) it would be more likely for him to generalize to all relevant stimulus situations during a game