[average:score_id]

Hello Gustavo and thank you for this excellent question.

At the moment, SimpleQuiz only uses numbers as score IDs. This means that you should form your questions by writing:
Example question text?
[score:1=10] This option will add 10 points to the total score and to the score with ID 1.
[score:1=5] This option will add 5 points to to the total score and to the score with ID 1.
[score:2=22] This option will add 22 points to to the total score and to the score with ID 2.
[score:9=25] This option will add 25 points to to the total score and to the score with ID 9.

As such, the [average:score_id] tag in the Complete text, can have the following format:
[average:1]
[average:2]
etc...

I understand that this may not be 100% intuitive when having scores like openness or conscientiousness, but if you assign them an ID from 0 to 9 and write the score options as mentioned above, it will work exactly as you want it to.

Let me know if there's anything we could do to improve this.
Thanks again.

You are very welcome.
Let me know if you need any further assistance!