Methods of selecting a sample are described in reports because -----
A) internal validity may be threatened by some methods of finding a sample.
B) testing effects can confuse some participants.
C) correlational analyses are always more informative when the sample is homogeneous.
D) Type I errors can be affected by an improper approach to selecting a sample.

Question

Quizplus · Accepted Answer

Internal validity refers to the accuracy of conclusions about cause-and-effect relationships between variables within a study. If the sample is not representative of the population or if there are biases in the selection process, then the internal validity of the study may be threatened. Therefore, researchers describe their methods of selecting a sample to ensure that the sample is accurately representative of the population and free from biases.

Methods of Selecting a Sample Are Described in Reports Because