A researcher can evaluate the effectiveness of the manipulations ...

[newyorker26]

A researcher can evaluate the effectiveness of the manipulations of the independent variable by including
 
  A) a test for independence of groups.
  B) a variable check.
  C) a manipulation check.
  D) an F-test.

Question 2

A general but important rule in experimentation is that each study is designed so as to
 
  A) control experimental variance, maximize extraneous variance, and control error variance.
  B) maximize experimental variance, control extraneous variance, and minimize error variance.
  C) maximize all variance except error variance.
  D) ignore error variance and maximize between-groups variation.

[Chelseyj.hasty]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: B

[newyorker26]

TYSM

Thanks for the timely response, appreciate it