010_Internal Validity and Research Design

Question 1

Internal validity is primarily a concern of causal studies_____

Answer 1

• Experimental, quasi-experimental, and single-subject designs
• Use random assignment when possible
• Control for confounding variables

Question 2

Internal validity of descriptive and correlational designs refers to the quality of the study (e.g. how well the study was run)____

Answer 2

• Lack internal validity in regard to causation

- Look for and minimize extraneous variables

Question 3

what are the types of Internal Validity Threats?

Answer 3

• Selection
• History
• Maturation
• Repeated Testing
• Instrumentation
• Regression to the Mean
• Mortality (attrition)
• Experimenter bias (e.g., expectancy effects)
• Participant bias (e.g., Hawthorne Effect)

Question 4

In quasi-experimental studies there is a lack ___

Answer 4

of random assignment.

Question 5

True or False: The internal validity of a single-subject design is typically low.

Answer 5

False