Complex sentence: Recent research in fact provides evidence that people who have positive illusions may have both short term benefits and long term costs.Specifically self-enhancement does is not correlated with academic success or graduation rates in college (Robins & Beer, 2001).
Split into simpler sentences: Recent research in fact provides evidence that people who have positive illusions may have both short term benefits and long term costs. Specifically, self-enhancement is not correlated with academic success or graduation rates in college (Robins & Beer, 2001).