NPR’s "It's All Politics" blog refers to Temple political scientist Christopher Wlezien's research and book in a story about the impact of the upcoming presidential debates. A comprehensive study, by Robert Erikson and Christopher Wlezien, found that "evidence of debate effects is 'fragile,'" writes the blog's author. "In other words, in the average election year, you can accurately predict where the race will stand after the debates by knowing the state of the race before the debates, Erikson and Wlezien conclude."