Which of the following variables is presumed to vary as a result of the researcher's manipulation of another factor or condition?

Which of the following statements is true of the experimental method of research?

A) In the experimental method of research, participants in control groups obtain the treatment being tested. B) The experimental method fails to answer questions about cause and effect. C) In the experimental method of research, participants in experimental groups do not obtain the treatment being tested. D) The experimental method allows psychologists to control the experiences of participants and draw conclusions about cause and effect.

U = 0 indicates the greatest degree of separation between the groups

Indicate whether the statement is true or false