Author Question: What is a common approach used by researchers to control for the possible influences of history and ... (Read 7 times)

scienceeasy · **on:** Jun 22, 2018

What is a common approach used by researchers to control for the possible influences of history and maturation in a longitudinal experiment?

a) Include a placebo group in the design.
b) Include an additional experimental condition in the design.
c) Include a no-treatment group in the design.
d) Control for differences in the history of participants.

Question 2

Which of the following is NOT a threat to the internal validity of an experiment?

a) History
b) Maturation
c) Attrition
d) Sample characteristics