Correlation
- Created by: 8mcgada
- Created on: 02-02-14 13:02
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- Correlation
- positive correlation
- value of one of the variables increases, the values of the second variable also increase
- as the value of one of the variables decreases, the value of the other variable also decreases
- negative correlation
- as the values of one of the variables increase, the values of the second variable decrease
- as the value of one of the variables decreases the value of the other increases
- no correlation
- shows no relationship between the variables
- Strengths
- allows researcher to establish that two variables are linked
- calculate the strength of the relationship between two variables by calculating the correlation coefficient
- easier as there is not IV to manipulate and dont have to control variables
- weaknesses
- cannot establish a cause and effect relationships- eg just because one variable is linked to another it doesnt mean that one causes the other
- lack of correlation may not mean there is no relationship, it could just be non-linear
- two variables can seem to be correlated, but when other variables are accounted for the seeming correlation disappears- called a spurious correlation
- positive correlation
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