In a drug trial investigating the effects of a new drug, neither the research scientists nor the participants know if they are in the treatment or the control group. What does this type of study design control for?
A) experimenter bias
B) extraneous variables
C) placebo effect
D) spurious correlations
E) non-random assignment
A) experimenter bias
You might also like to view...
A cellular response to a signal can be terminated by:
A. depletion of the signal that activates the receptor. B. inactivation of intracellular signaltransduction proteins. C. automatic inactivation of proteins in the signal pathway over time. D. depletion of a second messenger. E. All of these choices are correct.
A semipermeable membrane bag containing 10% sucrose is permeable to water but not to sucrose. The bag is immersed in water. The solution in the bag is ________ to the water, and water will move ________ the bag
a. hypotonic / into b. hypertonic / out of c. hypotonic / out of d. hypertonic / into
The mutualist relationship between certain
fungi and the roots of most plants is called
a. mycelium. b. mycorrhiza. c. mycotoxic. d. lichens. e. hyphae
Each "word" in the mRNA code consists of how many letters?
a. 3 b. 4 c. 5 d. more than 5 e. 0