The Main Internal Validity Problem of the Static-Group Comparison Design

question 42

Multiple Choice

The main internal validity problem of the static-group comparison design is

• A) observed posttest differences may be due to preexperimental differences between the groups rather than to the experimental treatment.
• B) the interaction between the experimental and control treatments.
• C) the pretest may sensitize subjects to the experimental treatment.
• D) the matching procedure may result in the loss of too many subjects and thus introduce bias.

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Definitions:

Appropriate Mix

The optimal combination or proportion of various elements to achieve a specific goal, often used in the context of investment portfolios.

Priced

Determined the monetary value of a product, service, or asset.

Cereal

A food product made from processed grains, typically eaten as a breakfast food, often fortified with vitamins.

Percent Change

The measure of the degree of change over time, calculated as the difference from the original value to the new value, divided by the original value, multiplied by 100.