Correlations

Question 1

Differences between correlations and experiments

Answer 1

Experiment design:
- require manipulation [change ] of the IV and a measurement of the resulting change in the DV

Correlations study:
- no variables are manipulated, two co-variables are measured and compared to look for A relationship

Question 2

Co variables

Answer 2

Two variable that are collected by the researcher and then compared

Question 3

Scattergram

Answer 3

A graph used to plot the measurements of two co-variables [ scattergram visually display the relationship between co-variables J

Question 4

Positive correlation

Answer 4

As one co-variable increase the other co-variable increase

Question 5

Negative correlation

Answer 5

As one co-variable increases the other co-variable decreases

Question 6

Zero correlation

Answer 6

No correlation between the variables

Question 7

Correlation coefficient

Answer 7

. Represents both the strength and direction of the relations ship between the co- variables as a number between -1 and +1

Question 8

Correlation coefficient calculated:

Answer 8

• Statistical test e.g. Spearman’s RHO or persons

Question 9

Correlation evaluation [ weakness ]AO3

Answer 9

• Correlation does not show causation [strong correlation = relationship exist between co-variables
  However doesn’t snow which co - variable led to the change in one other and may be an unknown third variable that have effected the co-variable

Question 10

Correlations evaluations strengths [A03]

Answer 10

-Fewer ethical issues as covariable data already exists and easily accessible
- correlation coefficient is a good tool in describing both the direction and strengths of relationships between variables