Hi, Carsten,
what you show, is not a "array dual scale".
You show two array(numbers) side by side.
What is the difference?
The difference is in the database.
An "array dual scale" creates for each subquestion TWO data fields - one for each scale - that contain the chosen values.
As you might have seen in the manual
www.limesurvey.org/manual/Question_type_-_Array_dual_scale
this type of array is often used to compare satisfaction and importance of several items.
But to store your answers for each subquestion you need a data field for each of your columns (6 in your example).
Here an example.
I just combined these two posts:
www.limesurvey.org/forum/can-i-do-this-w...ngs-with-subheadings
and
www.limesurvey.org/forum/can-i-do-this-w...ay-dual-scale#179468
(here the title is a bit misleading, because the TO wasn't aware of the backgrounds,too)
and it should be checked, that each option is selectable only once.
This you will do by question validation.
Best regards
Joffm
And here the working example