-questioning everything the trainer says or proposes by challenging credibility

-making comments that the training is a waste

-asking questions about material that was covered earlier in the session

-refusing to participate or do what has been asked, and more

-is a skeptic about training in general or the new skills being offered in the training

-having much to say and can easily take too much time 

- taking over a training session as it gives them a captive audience

-might interrupt and doesn't mind impromptu speaking at all

- detracting a trainer from achieving specified learning objectives

 «what they think of the training (which is probably not very much) to where they will go for lunch at the break (if it will ever get to that time) or whatever

-the behavior can be anywhere from innocent, such as two people who had work business to attend to and didn't know when there would be time later to exchange information, to ones who don't care if they disrupt

-they didn't understand the question or request, they're bored

-they believe the question or response is beneath them or perhaps insignificant

-there may be a monopolizer in the group and they've been intimidated to the point of not bothering to respond. 

- not wanting to say anything or simply don't care

-it's quite easy to go off on tangents and get sidetracked from the original purpose as they bring their own agendas to the training session.