The Clore Et Al

The Clore et al. study of the effect of interracial contact at a summer camp on interracial attitudes

A) randomly assigned black and white children to segregated and integrated settings.
B) was limited by its reliance on a single, subjective measure of the dependent variable.
C) showed that the camp experience changed the attitudes of girls but not boys.
D) was unable to rule out maturation or statistical regression as validity threats.