Answer:
Has not developed an understanding of the cues to performance of these pragmatic skills.
Step-by-step explanation:
In this context, Understanding cues to performance refers to humans' ability to observe the situation around us, and deliver the most appropriate technique that help us benefit from the situation.
From the excerpt, we know that John has a very good pragmatic skills in general. But this test is most likely taken under a structured situation that does not represent the actual real life. So, when John actually encountered it in his social life, he does not understand when is the proper time to actually use the skill.