VARIABLES

Question 1

EXTRANEOUS VARIABLES

Answer 1

• Do not vary systematically with the IV so doesn’t act as an alternative IV
• BUT it may have an effect on the dependent variable
• This makes significance difficult to detect
• They are classes as ‘extra’
• They should be controlled

Question 2

CONFOUNDING VARIABLES

Answer 2

• Variable that is not the IV
• Confounding variable may change dependent variable rather than the actual IV