McKenna designs a study in which she has two control and two experimental groups. In her design, one control group receives a pretest while the other does not, and, one experimental group receives a pretest while the other does not. McKennaâs design is an example of a design.

An example of Solomon four-group design

Explanation:

The Solomon four-group design is a research method developed by Richard Solomon in 1949. It is sometimes used in social science, psychology and medicine. It can be used if there are concerns that the treatment might be sensitized by the pre-test

It is also an experimental design that assesses the quality of pretest sensitization effects, that is, whether the mere act of taking a pretest influences scores on the following administrations of the test.

1. artillery

2. jose san martin

3.their economies remained dependent on outside powers.

4. drafted new economies

5. democracies have replaced dictatorships

rain should be the answer.