Pokorny, a burn victim, reduced perceived pain by _____.
A) viewing photographs of other burn victims
B) microstimulation to the nocioreceptors in the forearm
C) having a discussion of the placebo effect with his doctor
D) playing a virtual-reality game during treatment
Question 2
A researcher finds that height and intelligence are correlated in children. The age of the child is probably which of the following?
a. A mediating variable
b. An extraneous variable
c. A common-causal variable
d. An outcome variable