correlations

Question 1

what are correlational techniques?

Answer 1

measures the strength and direction of a relationship between two or more co-variables

Question 2

positive correlation

Answer 2

as one variable increases the other increases

Question 3

negative correlation

Answer 3

as one variable increases the other decreases

Question 4

zero correlation

Answer 4

there is no relationship between co-variables

Question 5

what is a correlation coefficient?

Answer 5

• measure the strength and nature of a relationship between co-variables
• between -1 (perfect negative correlation) and 1 (perfect positive correlation)

Question 6

what graph is used?

Answer 6

a scattergraph shows the correlation between 2 co-variables by plotting points to represent scores

Question 7

evaluate correlational techniques

Answer 7

+ ideal place to begin preliminary research investigations as they provide insight for future research

+ can be used when a lab experiment would be unethical as the variables aren’t manipulated, just correlated

– cannot establish a cause and effect relationship