Steven Harper, currently editor of BYU Studies, had a significant interview with Gospel Tangents in which he discussed the way a historian's worldview affects his/her interpretation of the evidence.
Here's a portion of the transcript from the website:
The conversation involved the way different people interpret the identical facts differently. Original in blue, my comments in red.
GT: So, that’s your biggest issue: you’re a believer. They’re not. We’re going to look at facts differently, just based on our point of view. Is that right?