Link between video games, violence could be more myth than fact

Do video games trigger violent behavior? Scientific studies have found no link. But the persistent theory is back in the headlines following the mass shooting in El Paso, Texas, on Saturday.

An online manifesto thought to be authored by the gunman briefly mentioned the combat game "Call of Duty." Then President Donald Trump weighed in, charging Monday that "gruesome and grisly video games" contribute to a "glorification of violence."

Mr. Trump's statements were more reserved than during his last brush with the subject in 2018, when he called video games...