The United States Public Health Service and Tuskegee Institute in Alabama studied the effects of the disease syphilis on a group of poor African-American men.

VOA: special.2010.07.21

I think the answer is that both play a role but some of the effects are due to stereotypes above and beyond in-group favoritism.

我想两者都有,但刻板印象的影响,要高于组内偏爱。

耶鲁公开课 - 心理学导论课程节选

But 13% of patients on the high-dose group discontinued because of side effects during the first year, compared with 9% in the lower-dose group and 7.2% on placebo.

FORBES: The Fat Pill Might Make You Sad

Concerns were raised by campaign group Hauxair over the effects on health of a nauseous odour in Hauxton.

BBC: Village odour is not 'statutory nuisance'

The defeat or surrender of one group often has unpredictable effects on others.

ECONOMIST: Strife in eastern Congo