The Question of Internal Validity Refers to

question 19

Multiple Choice

The question of internal validity refers to

• A)the comparison of the results obtained for the experimental group with those obtained for the control group.
• B)whether the experimental stimulus really affected the dependent variable.
• C)the determination of the proper time to do the posttest.
• D)the determination of the proper time to do the pretest.
• E)generalizability.

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Definitions:

Observations

Data points or values that have been collected or measured through an experimental or observational study.

Matched-Pairs Sampling

A sampling method that involves pairing up subjects based on certain criteria before applying different treatments to each member of the pair.

Extraneous Factors

Variables that can influence the outcome of an experiment but are not the variables being studied.

Control Group

A group in an experiment that does not receive the treatment being tested and is used as a benchmark to measure how the other tested groups do.