Aims, Variables and Hypothesis

Question 1

What is an Independent Variable?

Answer 1

-The variable that is chosen by the experimenter to be manipulated

Question 2

What is a Dependant Variable?

Answer 2

-The variable which is chosen by the experimenter to be measured

Question 3

What is an Extraneous Variable?

Answer 3

-Any variable, which if not controlled by the experimenter, could effect the DV

Question 4

What is a directional hypothesis?

Answer 4

• A directional hypothesis predicts the direction of the results
• It states exactly how the DV will be affected by the IV

Question 5

What is a non-directional hypothesis?

Answer 5

• A non-directional hypothesis does not predict the direction of the results
• It merely states that the DV will be affected by the IV but does not suggest how

Question 6

What is a null hypothesis?

Answer 6

• A null hypothesis states that there is no relationship between the two variables
• There will be no changes in the DV due to the manipulation of the IV