When Participants Begin an Experiment but Fail to Complete It,the

question 44

Multiple Choice

When participants begin an experiment but fail to complete it,the internal validity of the experiment can be threatened.Which of the following types of subject loss poses the most serious threat to internal validity?

• A)the loss is selective in that some characteristic of the participant that is related to the outcome of the study is responsible.
• B)the loss occurs because of an error by the experimenter.
• C)the loss leads to different numbers of participants in the groups in the experiment.
• D)the loss occurs because of equipment failure.

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Definitions:

Business-Extension Exception

A legal doctrine that allows an employer to be held liable for acts committed by employees while performing tasks related to their employment, even outside regular business locations.

Electronic Communications Privacy Act

A United States federal law enacted in 1986 to extend government restrictions on wire taps from telephone calls to include transmissions of electronic data by computer.

Stored Communications Act

A United States federal law that addresses voluntary and compelled disclosure of "stored wire and electronic communications and transactional records" by service providers.

Password-Protected

Describes a file, piece of information, or device that cannot be accessed without entering the correct password.