• Review the Learning Resources on quantitative research.
• Consider internal and external validity, the differences between them, and threats to validity when conducting research.
• Reflect on which quantitative research design controls for all threats to internal validity.

BY DAY 3

Post your initial response to the following:

• What is the difference between internal and external validity?
• Select two internal validity threats and describe each.
• After examining each category and list of designs, determine which design controls for all threats to internal validity. Explain how this design controls for all threats. 

Please use the Learning Resources to support your post (i.e., cite and reference).