Correlations

Question 1

What is correlational analysis?

Answer 1

A technique that measures the strength of the relationship between two quantitative variables

Question 2

What is a positive correlation?

Answer 2

As one variable increases the other variable increases as well

Question 3

What is a negative correlation?

Answer 3

As one variable increases the other variable decreases

Question 4

What can the strength of a correlation vary between?

Answer 4

The strength of a correlation can be between -1 and 1

Question 5

What is the strength of 0 mean?

Answer 5

0 means that there is no correlation

Question 6

What does the strength of -1 mean?

Answer 6

-1 means that there is a strong negative correlation

Question 7

What does the strength of 1 mean?

Answer 7

1 means there is a strong positive correlation

Question 8

What is a strength of correlational analysis?

Answer 8

• Allows psychologists to establish the strength of the relationship between two variables and measure it precisely
• Allows researchers to investigate things that could not be manipulated experimentally for ethical or practical reasons

Question 9

What is a weakness of correlational analysis?

Answer 9

Correlational analysis cannot demonstrate cause-and-effect, we can’t tell which variable influences the other
It may be that a third unknown variable influences both

Question 10

What relationships can correlation measure?

Answer 10

Correlations can only measure linear relationships and cannot detect curve linear relationships