correlations
- Created by: gracemae31
- Created on: 26-04-21 17:37
View mindmap
- correlation
- assesses the relationship or association between 2 variables (co variables)
- correlations can be ...
- positive
- as 1 variable increases so does the other e.g as amount of alch increases so does reaction Time
- negative
- as 1 variable increases the other decreases e.g age increases so memory decreases
- zero
- no relationship between variables e.g age and intelligence
- positive
- always plotted on a scattergraph which. allows researcher to asses strength of relationship
- 'correlation coefficent'
- given a numerical-value between -1 and +1
- tells you the strength and direction of correlation
- closer too 1= stronger and close to 0= weaker
- weaknesses
- cannot say which variable is cause and which is effect
- sometime 3rd variable which is true cause of relationship
- e.g negative corrolationbetween smoking and life expectancy but true cause may. be stress
- stress makes you smoke more and causes illness such as hear disease
- e.g negative corrolationbetween smoking and life expectancy but true cause may. be stress
- strengths
- generate quantitative data so can be analysed
- demonstates link between variables to suggest suitable further research
- can be used when experiment wouldn't be ethical e.g by using existing data
Comments
No comments have yet been made