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
Structures of external, middle, and inner ear
Example of the Index to External Causes.
Experimental Apparatus for Fluidization Experiment
External auditory meatus
Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ...
Physical Findings of Massive Hemothorax