Correlations Flashcards
Correlation
An association between two variables called co-variables
Correlation coefficient
Number between -1 and +1 that represents the direction and strength of a relationship between co-variable
Positive Correlation
As one co-variable increases so does the other
Negative Correlation
Asone co-variable increases the other decreases
Zero correlation
There is no relationship between the co-variables
How is a correlation different to a experiment
An experiment manipulates the IV and to see the effects on the DV, whereas a correlation doesn’t have IV and DVs
When can correlations be used in stats testing
Spearman rho
Pearson’s rho
What is the correlation coefficient for a perfect positive correlation
1
What is the correlation coefficient for a high positive correlation
0.9
What is the correlation coefficient for a low positive correlation
0.5
What is the correlation coefficient for No correlation
0
What is the correlation coefficient for a low negative correlation
-0.5
What is the correlation coefficient for a high negative correlation
-0.9
What is the correlation coefficient for a perfect negative correlation
-1