A sequence of conditions in an interaction design might be ...

[Marty]

A sequence of conditions in an interaction design might be A-B-A-B-BC-B-BC. This design
 
  a. follows the important rule of changing only one variable at a time in single-case experiments.
  b. allows for determining if C has an effect.
  c. allows for determining an interaction effect for B and C, even if B is maximally effective alone.
  d. allows for determining if there are interactions for A and B as well as B and C.

Question 2

The null hypothesis always refers to the __________, whereas the research hypothesis always refers to the _______________.
 
  a) mean, standard deviation
  b) group differences, group similarities
  c) sample, population
  d) population, sample

[spencer.martell]

Answer to Question 1

A

Answer to Question 2

d

[Marty]

Thanks for the timely response, appreciate it

[nguyenhoanhat]

YES! Correct, THANKS for helping me on my review