correlations

Question 1

what is a correlation

Answer 1

• Determining the extent of an association between two variables
• (RELATIONSHIP AND ASSOCIATION)

Question 2

what is a positive correlation

Answer 2

• as one variable increases, the other increases = +1
• strong = dots close + in a line
• weak = dots scattered all over graph

Strong = 0.7-0.9
Mod = 0.4-0.6
Weak = 0.0-0.3

Question 3

what is a negative correlation

Answer 3

• as one variable increases, the other decreases = -1
• strong = dots close + in a line
• weak = dots scattered all over graph

Strong = 0.7-0.9
Mod = 0.4-0.6
Weak = 0.0-0.3

Question 4

what is no correlation

Answer 4

No relationship between the variable = 0

Question 5

what is the Correlation coefficient (r)

Answer 5

A number between -1 and +1 that tells us the direction and strength between the two variables

Question 6

what is an intervening variable

Answer 6

A variable that occurs between the independent and dependent variables - can’t control as we aren’t manipulating

Question 7

what is a third variable problem

Answer 7

A type of confounding in which a third variable leads to a mistaken causal relationship between two others

Question 8

what are the strengths/positives of correlations

Answer 8

• Useful because we can use them when research may have ethical issues
• They can lead onto experiments or experimental research ( if we see a relationship, we can further investigate this )

Question 9

what are the weaknesses/negatives of correlations

Answer 9

• Cause and effect (as experimenters , we have not manipulated variables, therefore we cannot be sure of the relationship, as the relationship may just be a coincident , all we can do is suggest a link )
• This can also lead into a third variable problem, which can have an impact