Internal validity is
a. the extent to which the results of an experiment can be attributed to the manipulation of the dependent variable, rather than to some confounding variable.
b. the extent to which the results of an experiment can be attributed to the manipulation of the independent variable, rather than to some confounding variable.
c. the extent to which the results of an experiment can be generalized.
d. both b and c.
Question 2
A researcher would like to examine the political attitudes for students at a local university. The researcher will evaluate a sample of 200 students but would like to be sure that the ages and genders of individuals in the sample accurately represent the ages and genders for the entire student body at the university. What would be the best sampling method for the researcher to use?
a. simple random sampling
b. stratified random sampling
c. proportionate stratified random sampling
d. systematic sampling
The Meselson-Stahl Experiment p1
Location of internal and external hemorrhoids.
The kidney. Illustration of a sectioned kidney, which reveals its internal features.
Ganzfeld experiment
Results of the study by Laruelle et al. (1996)
Schematic Diagram of the fluidized bed for the experiment (CHE415 Unit Operations)