PSYC311 factor effects and interactions

Which is the correct definition of a two-way

interaction between factors A and B?

• The effect of A differs across levels of factor B (and vice versa)

• The effect of A is the same at all levels of factor B

What is this type of figure called?

• A plot

• A mean plot

• A factorial plot

• A model plot

The values in the top table are the raw data. Using this raw data, various means were calculated.

The means in the red box are the...

• Marginal means

• Group means

• Cell means

• Baseline mean (u)

The values in the top table are the raw data. Using this raw data, various means were calculated.

The means in blue writing are the...

• Marginal means

• Group means

• Cell means

• Baseline mean (u)

Answer explanation

Marginal means are called that because they're written in the margins. They average across all levels of one factor (e.g. praise/blame) to get the mean of one level of another factor (e.g. introverts)

Which type of mean do we use to make a factorial plot?

• Marginal means

• Group means

• Cell means

• Baseline mean (u)

If we make a factorial plot, by looking at the lines, how can we tell if there is an interaction or not?

• If the lines are parallel

• If the lines are not parallel

• If the lines are intersecting

• If the lines will never intersect

Which main effects or interactions does this data have?

• Main effect for Factor A

• Main effect for Factor B

• An interaction between Factor A and B

• No main effects or interaction

Which main effects or interactions does this data have?

• Main effect for Factor A

• Main effect for Factor B

• An interaction between Factor A and B

• No main effects or interaction

Which main effects or interactions does this data have?

• Main effect for Factor A

• Main effect for Factor B

• An interaction between Factor A and B

• No main effects or interaction

Which main effects or interactions does this data have?

• Main effect for Factor A

• Main effect for Factor B

• An interaction between Factor A and B

• No main effects or interaction