In a study on effectiveness of therapy in treating depression, ...

[notis]

In a study on effectiveness of therapy in treating depression, participants are randomly assigned to groups so that 10 receive cognitive behaviour therapy (CBT) and 10 are assigned to a no-treatment control condition.
 
  The outcome improvement scores for participants in the CBT group are quite different from each other (e.g., some had minimal improvement scores, while others showed large benefits). This discrepancy is referred to as:
 
  a) The third variable problem
  b) The directionality problem
  c) Within-group variance
  d) Between-group variance

Question 2

Kathleen experiences pretty wild mood swings regularly. She always seems like she's up or down, but rarely, if ever, stable. Her symptoms are consistent with both depression and mania. She is most likely experiencing:
 
  a) Melancholia
  b) Mixed episode
  c) Cyclothymic disorder
  d) Psychotic features

[LegendaryAnswers]

Answer to Question 1

c

Answer to Question 2

b

[notis]

Thanks for the timely response, appreciate it

[frankwu0507]

Gracias!