RM L11: Correlations - Flashcards
1
Q
What is correlation research?
Lesson 11
A
- Investigates relationships between variables without the researcher controlling / manipulating them
2
Q
What is a correlational study?
Lesson 11
A
- Non experimental
- Because unlike in an experiment a correlation study does not tell us about causal relationships
3
Q
What is correlation?
Lesson 11
A
- Checks to see if 2 sets of numbers / variables are related
- Are the 2 variables related?
- The numbers being analysed are behaviours / variables that could affect behaviour that produces quantitative data to establish whether correlation exists
- The relationships between 2 measured variables
- Correlation is not causation
- Variables in correlation studies are called co-variables
4
Q
What is positive correlation?
Lesson 11
A
- When one variable increases and second variable also increases
- As one variable increases so does the other
- Height and shoe size increasing
5
Q
What is negative correlation?
Lesson 11
A
- When one variable increases and the second variable decreases
- As one variable increases the other one decreases
- Height above sea level and decrease in temperature
6
Q
What is no correlation?
Lesson 11
A
- No definitive trend
- 2 variables do not appear to be related
- No linear pattern between variables
- Head size and test scores
7
Q
What is a correlation co - efficient?
Lesson 11
A
- Statistical method for assesing the strength of a correlation
- The sign (+ or -) tells you the direction of the correlation
- The number between (0-1) tells you the strength
- Tells us if strong positive / weak positive
8
Q
What is the difference between an experiment and correlation?
Lesson 11
A
Experiment:
- Looking for a difference
- Looking for cause and effect relationship between IV and DV
- Has groups / conditions
- Displayed on bar charts / histograms
Correlation:
- Looking for relationship between 2 variables
- No IV / DV only co-variables
- No groups
- Displayed on scattergrams (scattergraphs)
