Author Question: History, maturation, and regression to the mean can be controlled by including proper A) control ... (Read 21 times)

ahriuashd · **on:** Aug 4, 2018

History, maturation, and regression to the mean can be controlled by including proper

A) control groups
B) experimental groups.
C) factorials.
D) instrumentation.

Question 2

The major difference between the control groups of the pretest-posttest, natural control group design and the randomized, posttest-only, control-group design is that

A) in the latter, participants are randomly assigned to groups.
B) in the former, the people in the control group are aware of the research hypothesis.
C) in the latter, participants are only assigned randomly to the experimental group, but not the control group.
D) there is no real difference between the two designs.