Correleational Analysis Flashcards
Define Correlational analysis
Is the measurement of the relationship between 2> co-variables
The illustrate the strength and direction of the correlation.
What is a positive correlation?
When 1 variable increases the other increases
What is a negative correlation?
As 1 variable increases the other decreases
What is a zero correlation
No relationship between variables
What is a correlational hypothesis
Its a prediction that states the expected relationship between 2 co variables
Correlational r_______ are identified and demonstrated through the use of s_________ t________.
Relationships
Statistical techniques
In correlational hypothesis the variables have to be o___________
Operationalised
What kind of data does CA rely on?
Quantitative
What 2 ways are correlational represented?
- Scatter gram
- Correlation co efficient
Explain a scattergram and how to plot one
- Visual representation of the C relationship
The scores are plotted on the graph where each variable are on each axis
Which direction does a strong/weak/no correlation on a scattergram go in?
S: Up to the right
W: Down to the right
N: Nothing
WHat is a correlation co-efficient
Numerals representation of the strength and direction of the relationship between 2 co variables
E.g
+1
0
-1
What does the number indicate?
The strength of the relationship
What does the sign indicate?
Wether its positive or negative
What does +0.9 mean as a correlation coffeciennt + why
Strong positive
Because the closer it is to 1 the stronger the correlation
What’s the diffrence between a correlation and an experiment
E: The IV is manipulated and measures a cause and effect relationship
C: No manipulation and does NOT show a cause and effect relationship
What are some strengths of this method?
4
- Useful as a primary tool / starting point
- Provide a precise and quantifiable measure of how 2 variables are related
- Practical and easy/ cheap / less time consuming
What are some weaknesses
Doesn’t tell us why there is a relationship but only how
A 3rd variable - there could be an untested variable that is causing / effecting the relationship.
They can be misused, especially by the media as a cause and effect
