Douglas Gentile , who has studied the impact of media on children and adults,
including the effects of video games on physiology and behavior, has argued that violent video
games cause increased arousal, aggressive thoughts and feelings, aggressive behavior, and
decreased socially appropriate behavior. Gentile has interpreted the inverse relationship
between the increased number of violent video games and decreases in school-associated
violent deaths with a variety of psychosocial factors in the period 2000 through 2010.
improved economic conditions, laws, gun availability, and longer prison sentences. He also He
has argued that school shootings result from highly extreme behaviors by perpetrators who
have many risk factors for lethal violence, including violent video games.