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
An example of an experiment that supported Beadle and Tatum's one gene
Examples of the results of sexual selection, a type of natural selection.
Validity versus Reliability
In which experiment was the hormone glucagon used?
Results from Kliegl's study show that older adults can learn complex information-processing
Experiment: Response to Auxin