This weeks seminar will focus on the use of measurement

Question

This week's Seminar will focus on the use of measurement tools to assess client behavior. Create your Seminar responses in MS Word. Your response to the questions above should be composed in complete sentences and paragraphs and be 300-350 words in length

1. What do the letters A, B, and C represent in single subject designs?
2. What do the letters O, X, Y, and R represent in group research designs?
3. What are threats to internal validity?
4. Explain history and maturation as to how they can be a threat to internal validity.