Use this feature to transform a set of questions into a single multiple variable (by superposing all the selected questions).
You can select either transform into multiple (yes/no) or transform into multiple (no/yes).
The following dialog appears:
Move the variables you want to transform into the right-hand list, by selecting them and clicking the right-hand arrow. Any numeric questions you select must have responses of 1 or 0 only.
The new variable will appear in the questionnaire immediately after the last question selected. The original variables will automatically have their visible in analyse property de-selected.