correlations

Question 1

define correlation

Answer 1

determining the extent of association between two variables
they may be linked= zero correlation
they increase together= positive correlation
as one increases the other decreases= negative correlation

Question 2

what is a correlational hypothesis

Answer 2

states the expected association between two co-variables

Question 3

what is a correlation coefficient

Answer 3

a number between -1 and 1 that tells us how closely co-variables in correlational analysis are associated

Question 4

how are correlations graphed.

Answer 4

via scatter diagrams= a graphical representation between co-variables between two set scores

Question 5

evaluate the strengths of correlations

Answer 5

+ used to investigate trends in data. If significant then justifies further research. If not then it can be ruled off as a casual relationship

+ procedures in a correlation can be easily repeated so findings can be confirmed

Question 5

evaluate the weaknesses of correlations

Answer 5

• in correlations variables are simply measured and no deliberate change is made, therefore correlations cant establish cause or effect
• may lack internal/external validity