dr. dorothy espelage professor in the the cut of educational psychology at the university of illinois urbana champagne and she's been conducting research on bullying, homophobic teasing, sexual harassment and dating violence the last 20 years. she will start off by reviewing the risk factors associated with aggression and bullying and discuss how it is linked with gender based aggression. >> thank you. >> thank you for a much. good morning. so, we have about 12 minutes to take you for 20 years of research. hopefully you have your coffee. what i first want to do is because we have about 12 minutes, i want to talk about what we know from the perspective. if we were to take the study and look at the extent to which they looked at 153 studies and see what we know about those kids that bully others peery if we look at this data analysis across on hundred 53 studies, from the cross sectional studies many snapshot, if we look a child that belize others at high rates, what we see that occurs? and what we find is that at least cook and his colleagues at the university of washington found these kids h