Correlations

Question 1

What is a correlation

Answer 1

A statistical technique used by psychologists- involves measuring 2 variables

Question 2

What is a positive correlation

Answer 2

Relationship between variables where as one increases the other increases

Question 3

What is a negative correlation

Answer 3

Relationship between variables where as one increases the other decreases

Question 4

What if there is no correlation

Answer 4

Said to be uncorrelated and have no relationship

Question 5

How are correlations presented and measured

Answer 5

Displayed on a scatter graph
One variable arranged along the horizontal axis and the other on the vertical axis.
Axis should be fully operationlised and labelled

Question 6

What if a number is close to 1 in a correlation co efficient

Answer 6

There is a strong positve correlation
(closer to 0.5 than 1 than weak positive)

Question 7

What if a number is close to -1 in a correlation coefficient

Answer 7

There is a strong negative correlation ( closer to -0.5 than weak negative)

Question 8

What is the number is close to 0

Answer 8

variables are uncorrelated

Question 9

What are the rules for correlational hypothesis

Answer 9

One tailed- Must say if positve or negative and state the direction
Two-tailed- Say there will be a significant relationship/correlation but no direction stated
Null- Must include there will be no relationship/correlation

Question 10

What is an example of a one tailed correlational hypothesis

Answer 10

There will be a positve correlation between a persons weight in kg and their level of extroversion as a person weight increases their level of extroversion also increases

Question 11

What is an example of a two tailed correlational hypothesis

Answer 11

There will be a significant correlation between the amount of chocolate eaten and the level of happiness on a rating scale

Question 12

What are the strengths of conducting a correlation

Answer 12

You can identify a relationship between 2 variables without having to manipulate behaviour- good as it can be used if impossible or unethical to manipulate in experiments
Can also be used to suggest future, further research usefullness so it enhances knowledge to make practical applications

Question 13

What are the weaknesses of conducting correlations

Answer 13

Cannot establish cause and effect as correlations only show a relationship between co-variables so its less scientific and we need further research
Other unknown variables may cause the relationship between our co-variables being measured so this lowers internal validity because we dont have a full picture of which led to the relationship