When multiple treatment effects are not anticipated, the _____ ...

[nramada]

When multiple treatment effects are not anticipated, the _____ design is a good choice because the participants in the different conditions of the experiment can be assumed to be equivalent.
 
  a. repeated measures c. between subjects
  b. between groups d. both b and c

Question 2

When experiencing one condition in an experiment changes the participants in some way, we say that _____ effects are present in the experiment.
 
  a. reliability c. multiple treatment
  b. validity d. measurement

[Tonny]

Answer to Question 1

A
In repeated measures designs, the same people participate in the control and experimental conditions; therefore, they are equivalent if there are no multiple treatment effects.

Answer to Question 2

C
Order effects occur when being in one condition before another is not the same as experiencing them in the other order.

[nramada]

TYSM

[kjohnson]

Thanks for the timely response, appreciate it