If question or answer is repeated do not not pass over, ignore, or cut them off. Act as a prober - have the person expand on the statement. New ideas may surface in the explanation. Participants of meeting will take various roles. Pay attention to the stage the meeting is in and the different roles participants take on.
People strive to satisfy their own psychological needs, whether it be unconscious or conscious.
Pay attention to the various roles participants take on. Same person may adopt different roles in different groups. When one group meets numerous times, individual is likely to stay with role taken in first few meetings. A participant's positioning will signal acceptance and rejection of ideas. Anyone positioned with their back to speaker will probably reject speaker's proposals before they are even presented to them.