Correlation

Question 1

What is correlation analysis?

Answer 1

A technique used to investigate a link between two measured variables

Question 2

Give the definition of a correlation

Answer 2

A relationship between two variables

Question 3

What is a positive correlation?

Answer 3

The relationship between two variables such that an increase in one accompanies an increase in the other

Question 4

What is a negative correlation?

Answer 4

A relationship Between two variables such that an increase in one accompanies a decrease in the other

Question 5

What is a scatter diagram,?

Answer 5

A graph used to display the data from the correlation study. Each point on the graph represents the participants score on scales for each of the two measured variables

Question 6

What cannot be established when investigating a correlation?

Answer 6

CAUSE AND EFFECT

Question 7

What are the strengths of obtaining data from a correlation?

Answer 7

• Correlation can be conducted when two variables cannot be manipulated I ethical or in practical reasons.
• Demonstrates absence or presence of a relationship suggesting further on a further experiment.

Question 8

What form must data be in to establish a correlation?

Answer 8

Numerical

Question 9

What are the weaknesses of obtaining data from a correlation?

Answer 9

• Researchers cannot assume one variable causes another (cause and effect).
• correlation analysis can only be used by variables measured on a scale (numerically)

Question 10

What techniques can be used in correlation analysis to collect appropriate data?

Answer 10

• Self-report i.e. interviews and questionnaires

- Tests that produce interval data

Question 11

How can you achieve validity in correlations?

Answer 11

Making sure the variables are defined and measured affectively