In preparation for a study of the effectiveness of an antischizophrenia drug, an experimenter puts the experimental drug and the placebo into capsules of the same color and codes them. Neither the subjects nor the experimenter will know who gets the experimental drug or the placebo. This is an example of a:

This is an example of double-blind design.

Explanation:

Double-blind design refers to a type of experimental design. It is common for participants to be divided into two groups, the experimental group and the control group. The experimental group is the one that will take the new drug, while the control group takes the placebo. Normally, the experimenter would know to which group each participant belongs, although participants themselves wouldn't know. When neither the experimenter nor the participants know to which group they belong, we have a double-blind design.

answer; i believe that the correct answer is rapid and subsequently slow down;

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.