Correlations

Question 1

What is a correlation?

Answer 1

An association illustrating the strengths and direction between to co-variables

Question 2

What is a scattergram?

Answer 2

Plotting a correlation on to a scattergram

-One co-variable on x-axis other on y-axis

Question 3

What are the three types of correlation?

Answer 3

• Positive correlation
• Negative correlation
• Zero correlation

Question 4

What is a positive correlation?

Answer 4

Co-variables rise or fall together

Question 5

What is a negative correlation?

Answer 5

Co-variables rise and the other falls

Question 6

What is a zero correlation?

Answer 6

No relationship between the two variables

Question 7

What are the differences between experiments and correlations?

Answer 7

• Experiment = manipulates IV and record DV
• Correlation = no manipulation so no cause and effect
• Experiment = controls extraneous variables
• Correlation = Does not control extraneous variables (maybe a third variable)

Question 8

Strength of correlation:

Answer 8

• Can suggest a future hypothesis

- Economical = less time consuming (don’t have to control the environment)

Question 9

Limitation of correlation:

Answer 9

• No cause and effect = intervening variable that explains the relationship
• Methods may be flawed in measuring the of variables = low in reliability