He also likes to observe people who are respondents who comment and responded well. Showed that they were more interested in what the results of the answer.
In addition He also likes to observe people who responded to the questionnaire, that is your opinion and interact well, it shows that they are interested in something more than the result of an answer.
He also noticed that the person who answered the questionnaire, provide comments and respond to each in the show that they pay attention to what the outcome of the answer more than asked.