Knowledge Base

Define Independent Variables

Aim

To define factors that can vary but are constant per participant and can, potentially, affect the analysis results.

Prerequisite

Your FaceReader license includes the Project Analysis Module.

Define Independent Variables

1. Choose Project > Independent Variables > Add Independent Variable.
2. Give a name to the variable, for example Experience level.
3. Choose one of the following:

   Numerical – Numerical variable values can have decimals and can also be negative.

   Nominal – Enter the independent variables categories in the Categories field. Click the Plus button to add the category. Define at least two categories for each independent variable.

Notes

• To delete or edit an independent variable, open the Independent Variables tab at the bottom of the Project Explorer. Right-click the independent variable you want to delete or edit and select the option you require.

Score Independent Variables

Aim

To enter a value for each Independent Variable.

Prerequisites

• Your FaceReader license includes the Project Analysis Module.
• You defined independent variables.

Procedure

1. Expand the Participant item in the Project Explorer.
2. Double-click Independent Variables.
3. Click the pencil button next to the Independent Variable.
4. Select the category. In the example below, this would mean defining the native language of each participant.

Note

The Independent Variables item in the Project Explorer displays a warning icon if the values have not been scored yet for a participant. Open the participant item and double-click Independent Variables. Then fill in the values.

Source: FaceReader 10 Reference Manual (Help), Noldus Information Technology