Randomization in an experimental design assures
a. external validity of the findings.
b. the relevance of the hypothesis in question.
c. accurate observation of the dependent variable.
d. statistical equivalence of groups.
e. lack of pretest sensitivity.
Question 2
The fact that young children's articulation problems often disappear by themselves over time indicates why researchers must use ____in order to have internal validity.
a. control groups
b. informed consent
c. objective measurement
d. pre- and postmeasures
e. statistical analysis
A, External respiration; B, internal respiration.
Location of internal and external hemorrhoids.
Experimental Evidence for Infrared Radiation
A planar design zirconia oxygen sensor places all of the elements together, which allows the sensor ...
Experimental demonstration of respiratory control
Experimental evidence that signals from dorsal lip cells initiate amphibian gastrulation. A dorsal l