Branching logic

Branching logic is also known as conditional display logic.

You can decide to show or hide specific questions based on the results of previous questions, including the results of calculated questions. Here, we are going to show a participant a warning about their BMI if it is over a certain value.

Create a BMI Warning

Activity

1. Click Add Field
2. Choose Descriptive Text (with optional Image/Video) for the Field Type.
3. In the Field Label, type the following: Based on the information you've provided, your BMI (body mass index) is in a range associated > with increased risk of cardiovascular diseases and diabetes.
4. In the Variable Name, type bmi_warning.
5. Click Save.
6. Click the Branching Logic Button ( ).
7. Select the Drag-N-Drop Logic Builder.
8. Drag bmi = (define criteria) to the right column.
9. Select greater than (>) and type 30 in the value field.
10. Note that the equation [bmi] > 30 also appears in the Advanced Branching Logic Syntax section above.