Tpartner, thank you !
In your exemple, "Q1" is the question's code, that's it?

Suppose I have 4 items (rows), then it will be
{if(Q1_SQ1 != ' ' AND Q1_SQ1 == Q1_SQ2 == Q1_SQ3 == Q1_SQ4, 1, 0)}

that's it?

If I don't want to introduce the condition "answer must be filled", then I take off (Q1_SQ1!=' ') that's it?
thank you!!

Tpartner
complentary : let's suppose I have 4 items in the table. Then if the respondent forget to check one radio button but answers the same "column" (scale answer) for all the other items. Then I would like to attribute value 1 to the hidden test-variable.
do you know how it this feasible (seems complicate to code...) ?
Thank you

Suppose I have 4 items (rows), then it will be
{if(Q1_SQ1 != ' ' AND Q1_SQ1 == Q1_SQ2 == Q1_SQ3 == Q1_SQ4, 1, 0)}

that's it?

No.

complentary : let's suppose I have 4 items in the table. Then if the respondent forget to check one radio button but answers the same "column" (scale answer) for all the other items. Then I would like to attribute value 1 to the hidden test-variable.
do you know how it this feasible (seems complicate to code...) ?

I don't understand the question. I thought the requirement was to insert 1 into an equation question if all answers are the same.

thank you Tpartner
1) what is the importance of writing (Q1_SQ1 != '') ? Do I have to write this for all the SQs?
2) Seconde point : yes you are right. But With this equation, if I don't answer to 1 of the questions, and even if I answer the same thing to all the OTHER questions, then the equation value is "0". So how can I manage this case? that is : set value "1" to the equation if the person answer the same to all the question and EVEN IF he doesn"t answer to 1 or 2 questions. (because my questions are not mandatory, so answering is optional)
Thank you very much !!!

T partner !
I've tried your proposal : {if(Q1_SQ1 != '' AND Q1_SQ1 == Q1_SQ2 AND Q1_SQ1 == Q1_SQ3 AND Q1_SQ1 == Q1_SQ4, 1, 0)}
It is not working: in the result export, instead of "0" or "1", LS reports the equation as a result for the variable...

My proposition with {if(Q1_SQ1 != ' ' AND Q1_SQ1 == Q1_SQ2 == Q1_SQ3 == Q1_SQ4, 1, 0)} seems working I think.. need to test it more to me sure.

What did I do wrong with your proposal according to you?
Thank you !!

LS reports the equation as a result for the variable

That normally indicates that you have defined a variable incorrectly.

Tpartner, I have checked the code several times to respect your model. And I have 6 variables of that kind, all with this kind of result. I guess it is hardly a problem of bad writing, what do you think ? have you tested the code you proposed to me? I don't really know what to do...
thank you !!

have you tested the code you proposed to me?

Working survey attached!

Tpartner
Thank you. I think I forgot the {..}. I will see if it works (survey already activated).
If the hidden "equation question" is set at the next page, is that a problem ? You put them in the same page. I thought the system needed a "submit" to generate the "SQ" and values, etc.
best,

Expression Manager is dynamic on a page (mostly).

Dear Tpartner
It is strange because in the file "result export" I can find "0", "1" and the equation in extenso.

What is wrong according to you?

by the way, the equation is
if(L1croyABfermeesPos_SQABPOS1 != ' ' AND L1croyABfermeesPos_SQABPOS1 == L1croyABfermeesPos_SQABPOS2 AND L1croyABfermeesPos_SQABPOS1 == L1croyABfermeesPos_SQABPOS2 AND L1croyABfermeesPos_SQABPOS1 == L1croyABfermeesPos_SQABPOS3 AND ... , 1, 0)

thank you !