Picture the American political spectrum as a horizontal line drawn from left to right. It has a scale of 0 to 100 with 50 being the center line.
The left most quarter is from 0 to 25 and the right most quarter is 75 to 100. What this is saying is the group of people that fall in the range of 49 to 100 think the media is biased for the left. The group that is in the 0 to 26 range think it is biased to the right. That means the media must fall between 27 and 48. If that is the case then the people from 0 to 26 will see the media as being to the right of them. The people in the 49 to 100 group will see the media as being to the left of them.
Those between 27 and 48 will see the media as neutral or just a little bit to the right or left of them.
According to this analysis the media center point is 12 points to the left of center. On a scale where the left is 0 to 50 then the media scores a 38. Remember we are going from far left to far right. 38 is a mainstream leftist position. For example a the group from 1 to 43 voted for Dukakis in 88 and 1 to 42 voted for Mondale in 84. A 38 is a reliable mainstream Democrat.