If a human observer becomes more proficient in the course of a ...

[tatyanajohnson]

If a human observer becomes more proficient in the course of a study, the type of threat to internal validity is called a change in
 
  A) proficiency.
  B) instrumentation.
  C) research bias.
  D) regression to the mean.

Question 2

The concept of regression to the mean suggests
 
  A) participants with extreme scores will score more extreme on a second test.
  B) scores of participants on a second test would be the same or similar to the first test.
  C) scores of participants on a second test would be less extreme on average on a second test.
  D) None of the above

[briseldagonzales]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: C

[tatyanajohnson]

Both answers were spot on, thank you once again

[briseldagonzales]

Great! Please up vote