If more participants drop out of one of the levels of your ...

[Ebrown]

If more participants drop out of one of the levels of your independent variable than a second level, you may have a problem with mortality as a threat to internal validity.
 
  Indicate whether the statement is true or false

Question 2

Suppose you have two levels of your independent variable and you assign participants to the levels by asking them to volunteer for one of the levels, the threat to external validity that you should be most concerned with is maturation.
 
  Indicate whether the statement is true or false

[rekilledagain]

Answer to Question 1

True

Answer to Question 2

False