Luther Lee Bernard (October 29, 1881 – January 23, 1951) was an American sociologist and psychologist.
He then taught sociology and social psychology at various North American universities and was finally a professor of sociology at Pennsylvania State University.
According to Lewis Coser Bernard's social psychological theory can be described as "modified behaviorism".
He adopted basic principles of behaviorism, but emphasized the influence of the environment on character formation.
Thanks to him, American social psychology turned away from an exclusively biological orientation.