Question

Albert Bandura, a famous psychologist, did a number of studies on aggression, children, and “observational learning.” In a series of studies, Bandura had some children watch a video in which an adult repeatedly hit, kicked, and threw a “bobo” doll (one of those weighted blow-up clowns). Other children watched a video of adults with the bobo doll, but the adults in the video did not hit, kick or throw the doll. The children were then placed in a playroom with the bobo doll and Bandura counted the number of times each of the children struck the doll. We recently did an identical experiment and the data are presented below:

Video with Adults hitting bobo: 20, 65, 41, 80, 52, 35, 17, 34

Video with Adults not hitting bobo: 5, 20, 0, 0, 10, 30, 0, 12

Bandura found that children who saw the video of the adults striking the bobo doll subsequently struck the doll more. Using alpha = .05, test the hypothesis that children who watch the video of adults striking the doll subsequently strike the doll more. Compute an estimate of effect size.

Answer 1