Looked them and found its a company called Performance Research out of Rhode Island.  Easy to find on the web.  They conduct phone interviews regarding your TV viewing habits so sponsors can get an idea of who is watching what shows and when.

They called on 24 Nov.  No message.

caller id states - Performance Res

has called 5 or 6 times, no voicemail messages and when i tried to answer or redial it just said unavailable