Vinnie was running a focus group. During the discussion, two…

Vinnie was running a focus group. During the discussion, two people seemed less willing to share their opinions about their experiences with the police on campus. While most people praised the police, these two individuals said they had felt harassed by the police.  However, Vinnie didn’t really probe these individuals about their experience as he didn’t see if fitting in with what most people were saying in the focus group. According to lecture, which of the common problems faced by moderators is this an example of?