Body Languages ->Chin Stroking
This Chin Stroke is the signal that the listener is going through the decision making process.
Making a decision
Stalling Clusters
When a person puts a pen or a finger in their mouth after you’ve asked for a decision, it’s a signal that he is unsure and reassurance is needed.
Evaluation/decision-making cluster
boredom cluster
The next picture shows evaluation with the head supported by the thumb as the listener becomes uninterested.

Evaluation, decision,boredom cluster