Multiple treatment conditions involve _____ a. more than one ...

[oliviahorn72]

Multiple treatment conditions involve _____
 
  a. more than one independent variable.
  b. more than two levels of the independent variable
  c. more than one dependent variable.
  d. more than two levels of the dependent variable.

Question 2

When a placebo control group is used, _____.
 
  a. participants don't know whether they are in the control or experimental condition.
  b. different amounts of the independent variable are presented to different participants.
  c. the design must be a within subjects design.
  d. all of these are true.

[Edwyer]

Answer to Question 1

B
Treatments are levels of the independent variable; therefore multiple treatments involve more than two levels of the independent variable.

Answer to Question 2

A
Participants all get a pill and they are not informed as to whether it contains the active ingredient or not; therefore they don't know which condition (control or experimental) is in effect.