Correlation Analysis Flashcards
What is correlation analysis?
- Tech for analysing data by measuring the strengths of the relationship between 2 co-variables
What will a correlation show?
- It will show 1 of 3 things:
1) Positive correlation (one increases so does the other)
2) Negative correlation (one increases and other decreases)
3) No correlation
What is the difference between correctional analysis and exp?
- Exp has the investigator deliberately change the IV to observe the effect on the DV
- C.A variables are imply measured and no changes are made
- Caffeine and a highhanded anxiety
How do we represent correlation analyses’?
- A scattergraph
- Shows the correlation between 2 sets of data (co-variables) by plotting dots to represent scores
- Statistical tests are used to calculate the correlation
- A stat test will have a value for +1 (perfect positive) & -1 (perfect negative)
What is a strength of correlation analysis?
Useful exploratory tools for research
- Can asses strength and direction of a relationship and provide precise quantifiable measures of how 2 variables are related
- Correlations are often used as starting points to asses possible patterns between variables before doing actual research
What is a weakness of correlational analysis
Cant account for cause and effect
- This type of analysis can only illustrate that variables are related but cant explain
- We couldn’t say that drinking more caffeine makes you more anxious, it could be if your more anxious you could drink more caffeine
Est. direction is an issue
