8- correlations

Question 1

what are correlations

Answer 1

technique for analysing the strength of the relationship between co-variables

Question 2

what is the correlation coefficient

Answer 2

• strength of the correlation

- between -1 and 1 (1 is strong positive and -1 is strong negative)

Question 3

what are the 3 types of correlations

Answer 3

• positive (one increases, the other increases)
• negative (one increases, other decreases)
• no correlation (no relationship between variables)

Question 4

positive evaluation of correlations (3)

Answer 4

+ can establish strength between 2 variables precisely
+ can investigate things that couldn’t be manipulated for ethical/practical reasons
+ predications can be made about the variables

Question 5

negative evaluation of correlations (3)

Answer 5

• can’t demonstrate cause and effect
• may be a confounding variable which influences both
• don’t measure curvilinear relationships