A doctoral student's unpublished study suggesting a link between extensive Facebook use and lower grades received a ton of attention last month. Now a new study finds no such correlation. The new study, published in the journal First Monday, used large samples and found no negative relationship between grades and Facebook use. The new study was conducted by Eszter Hargittai, associate professor of communication studies at Northwestern University; Josh Pasek, a doctoral student at Stanford University; and eian more of the University of Pennsylvania’s Adolescent Risk Communication Institute.