A difference between the performance of an experimental and a ...

[lracut11]

A difference between the performance of an experimental and a control group may be caused by:
 
  a. the independent variable.
  b. the dependent variable.
  c. a confounding variable.
  d. either the independent or a confounding variable.

Question 2

In an experiment to study the effects of caffeine on performance, an experimenter asked the male students in an introductory psychology class to drink two regular Pepsis before a test and the female students to drink two caffeine-free Pepsis. She then compared performance of the two groups on the test. A confounding variable in this study is:
 
  a. whether participants had studied for the test.
  b. the type of drink.
  c. the gender of the participants.
  d. the amount of caffeine in the Pepsi.

[sultana.d]

Answer to Question 1

D

Answer to Question 2

C

[lracut11]

Thanks for the timely response, appreciate it

[diana chang]

Gracias!