Correlation Flashcards
1
Q
What is the IV
A
The variable that is changed
2
Q
What is the DV
A
The variable that is effected by the changes from the IV
3
Q
Which research design can determine a cause and effect
A
Experimental research
4
Q
What does observational research do
A
- determine strength of a relationship
- cannot determine cause and effect
5
Q
What variable does X represent
A
IV
6
Q
What variable does Y represent?
A
DV
7
Q
What is the IV also known as?
A
Predictor variable
8
Q
What is the DV also known as?
A
The criterion variable
9
Q
What does a positive linear relationship show
A
As IV goes up so does DV
10
Q
What does a negative linear relationship show
A
As IV scores go up DV scores go down
11
Q
How do you calculate correlation coefficient?
A
- calculate Z scores for each scores of both variables
Multiply the ZX by the ZY
Add all the cross products together
Divide by the number of pairs of scores
12
Q
What are the three possibilities of causality?
A
- x causing y?
- Ycausing X?
- A 3rd factor could be causing both X and Y
13
Q
How do you calculate coefficient of determination?
A
Square the correlation coefficient
