A researcher gives half of her participants a new anti-anxiety ...

[lb_gilbert]

A researcher gives half of her participants a new anti-anxiety pill and the other half a placebo pill. She does not tell participants whether they have received an active treatment pill or a sugar pill. This is an example of what type of study?
 
  a. a prospective study
  b. a single-blind study
  c. a double-blind study
  d. a observational study

Question 2

A subject in your study correctly assumes that you are interested in whether people behave in a prejudicial way towards people of a homosexual orientation. She then goes out of her way to act friendly and nice. This represents an example of ______________
 
  a. the placebo effect
  b. participant bias
  c. error
  d. experimenter bias

[pocatato]

Answer to Question 1

Answer: b

Answer to Question 2

Answer: b