Regression 1 + 2

Question 1

Learning objectives:

Answer 1

Overview:
- Correlation recap
- Linear regression (Regression line/equation)
- Multiple regression
- Dichotomous and categorical IVs
- Reporting regression analyses
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Learning objectives:
1. Understand and be able to explain… the main aims of multiple regression analysis.
2. Understand and be able to explain… the difference between total variance explained by a model and the unique variance explained by individual predictors.
3. Be able to… compute a regression equation and plot it on a scatterplot.
4. Understand and be able to explain… the difference between unstandardised and standardised regression coefficients.
5. Be able to… conduct, report and interpret a multiple regression analysis.
6. Be able to… include and interpret continuous, dichotomous and categorical independent variables in a regression analysis.

Question 2

Correlations recap

Answer 2

Correlation - the degree to which scores (from a set of participants) on two variables co-relate.

Correlation coefficient (r ) - provides an index of the extent to which two variables are linearly correlated.

Scatterplot - A graph of participants’ scores on one variable plotted against their scores on a second variable.