The paper describing one of this thinker's experiments mentioned the repeated use of the phrase "He sure is a tough fella." That paper was co-authored by Dorothea and Sheila Ross. This psychologist named mastery experiences and social persuasion as major sources of a person's belief in their abilities to manage situations, which he called self-efficacy. He presented a theory of human motivation in his Social Foundations of Thought and Action. In his most famous experiment, he put nursery school 
The paper describing one of this thinker's experiments mentioned the repeated use of the phrase "He sure is a tough fella." That paper was co-authored by Dorothea and Sheila Ross. This psychologist named mastery experiences and social persuasion as major sources of a person's belief in their abilities to manage situations, which he called self-efficacy. He presented a theory of human motivation in his Social Foundations of Thought and Action. In his most famous experiment, he put nursery school students in a room full of toys like baby cribs and dart guns after having adults play with toys in front of them in different ways. For 10 points, name this psychologist who showed that children exposed to aggressive adult behavior were more likely to rough up the namesake inflatable toy in the Bobo doll experiment.
The paper describing one of this thinker's experiments mentioned the repeated use of the phrase "He sure is a tough fella.
Albert Bandura