When the Groups in a Quasi-Experiment Were Not Equivalent at the Beginning

question 17

Multiple Choice

When the groups in a quasi-experiment were not equivalent at the beginning of the study, _________ may compromise internal validity.

• A)maturation
• B)regression to the mean
• C)selection bias
• D)pretest-posttest contamination

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Definitions:

Sensation

The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.

Stimulus Attributes

Characteristics or features of a stimulus that can influence an individual's response or perception.

Lower-Order

Pertaining to basic or fundamental processes that do not involve complex cognitive operations.

Sky

The expanse of air over the Earth, visible from the ground, characterized by blue color during the day and darkness or stars at night.