To make sure that unintended variables do not confound a study, ...

[EY67]

To make sure that unintended variables do not confound a study, many potential variables
 
  a. Are kept constant, or the same, across conditions
  b. Can be made to co-vary with the independent variable
  c. Are ignored
  d. Are transformed into another measurement scale

Question 2

A confounded variable is one that
 
  a. doesn't vary
  b. varies with the dependent variable
  c. varies with the independent variable
  d. isn't correlated with either the independent or dependent variable

[frre432]

Answer to Question 1

a

Answer to Question 2

c

[EY67]

Gracias!

[kilada]

Thanks for the timely response, appreciate it