NR 449 W5D

• This area provides you with an opportunity to reflect on what you have learned and what concepts you still need further exploration on. 
• Answer 1 question. Include a short summary of what has been learned, and include question(s) that are still unclear.

Post your answer to 1 of the 3 questions with explanation and details. Please follow the Community Café Guidelines for participating in the Community Café. 

1. What is the difference between internal and external validity?
2. What is the difference between validity and reliability?
3. What is one method that can be used to measure construct validity?