Correlations Flashcards
1
Q
What is a correlation?
A
An association illustrating the strengths and direction between to co-variables
2
Q
What is a scattergram?
A
Plotting a correlation on to a scattergram
-One co-variable on x-axis other on y-axis
3
Q
What are the three types of correlation?
A
- Positive correlation
- Negative correlation
- Zero correlation
4
Q
What is a positive correlation?
A
Co-variables rise or fall together
5
Q
What is a negative correlation?
A
Co-variables rise and the other falls
6
Q
What is a zero correlation?
A
No relationship between the two variables
7
Q
What are the differences between experiments and correlations?
A
- 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)
8
Q
Strength of correlation:
A
- Can suggest a future hypothesis
- Economical = less time consuming (don’t have to control the environment)
9
Q
Limitation of correlation:
A
- No cause and effect = intervening variable that explains the relationship
- Methods may be flawed in measuring the of variables = low in reliability
