Answer: This behaviour is an example of DEINDIVIDUATION.
Explanation: Deindividuation is a loosening of self-restraint when anonymous in a large crowd.
This behaviour makes an individual see himself as a crowd instead of an entity. This makes the individual do whatever the large crowd is involved in.
Answer:
Psychological arousal is very simimal for several emotions, so it is not always reliable for the polygraph to distinguish one emotion reaction from another. For instance guilt from other reactions.
Explanation:
The polygraph can most certainly determine if a person is nervous or not, because the nervous system reacts under testing situations, as well as other body reactions. This is not sufficient enought to deternmine wether someone is lying or not, is guilty or not. Someone can be nervous, and the polygraph can identify it, but this does not neccesarily mean a person can be found guilty.