Answer the following questions based on your readings this week. Last week, we

 Answer the following questions based on your readings this week. Last week, we learned about the internal and external validity of a study.  This week we read about the validity of measures.  
How is this different? What is the validity of a measure and how can this be assessed?
This week we also read about the reliability of a measure.  
What is the reliability of a measure and how is this assessed?
What is the relationship between the reliability and validity of a measure?
Make sure to clearly define all terms and use examples, when appropriate, to illustrate your understanding of the material. As always, use APA-style citations and references for your work. 
 Complete the following readings from your textbook, Research Design and Methods: A Process Approach:
Chapter 6: Making Systematic Observations
Please do sub headings