Greenwald and his colleagues (2003) asked both black and white participants to press a shoot button when the target appeared to be holding a gun (rather than a harmless object such as a flashlight). their results showed that all participants mistakenly shot at more targets who were black. the results suggest that

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: