social research week 7 discussion

· 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).

By Day 6

Respond to two colleagues by:

· Comparing the threats of internal validity they chose with the ones you chose

· Suggesting ways in which one of their identified threats could be eliminated or its effects reduced when conducting a study