The following is an excerpt of the intervention methodology. For more information, please see the full text of the article on the publisher's website or through your institution's library.

METHOD

Two experimental and three control groups were randomly selected from five second-grade classrooms in a midwestern, suburban community within the Minneapolis-St. Paul metropolitan area. A pretest-posttest control group design was employed in the study. The two experimental groups received the posttest only; among the control groups one received the posttest only, one received the  pretest only, and one received both the pretest and the posttest. [...] A  total of 128 middle-class, white children were studied. Experimental Group 1, of 24 children, used materials which  included  pictures of mixed racial groups of children in middle- class, suburban  settings. Experimental Group 2, of 24 children, used materials which  included pictures of mixed racial groups of children in lower-class, inner-city settings. [...] Four  instruments, the Clark Doll Test, Peer  Evaluation  and  Preference Test, Categories Test, and  the "Show Me" Test, were used to  measure the attitudes of Ss coward black children. A fifth instrument, the Direct Comparison Test, was used to determine stereotypes of Ss toward blacks. [...]