Nadia suspects Nick is lying because he keeps repeating the same details while explaining why he was late for their study group. As this example shows, communication can be counterproductive.

Nadia suspects Nick is lying because he keeps repeating the same details while explaining why he was late for their study group. As this example shows, excessive communication can be counter productive

Explanation:

Excessive communication is the sending of too much communication of which  if there is little difference between subsequent and previous communications will lead to lost productive time and as in the question, increased suspicion about the reason behind the repeated communication about a single topic.

Therefore, as there is an increase in the number of communication or messages from one group to the other while the conditions and the message remain the same, the meaning of the communication diminishes.