Subjects may be used as their own control when a. experiencing ...

[lracut11]

Subjects may be used as their own control when
 
  a. experiencing one condition is unlikely to influence the response to another
  b. using statistical control is impossible
  c. there are likely to be sequence effects
  d. a within-subjects condition is not possible

Question 2

Dr. Rankin ran an experiment investigating the effects of packaging color on consumer preference for the pudding in the package. Each participant in the experiment tasted the same pudding from three differently colored containers and was asked to rate how much they liked each one. Dr. Rankin used a
 
  a. Between-subjects design
  b. Random design
  c. Within-subjects design
  d. Concurrent design

[wergv]

Answer to Question 1

a

Answer to Question 2

c