Hello,

Beginner, I hope to ask my question in the right place.

I carried out a first drowsiness questionnaire (Epworth) proposed for each of the 8 questions (EPW) 4 proposals (with assignment value) in the form of a radio list. As a result of the handover, I simply want a sum of the assignment values.
I created a last question (Q09) with an equation type response to perform this calculation. I inserted in the field "question" the formula:

{sum (that.EPW01.NAOK, that.EPW02.NAOK, that.EPW03.NAOK, that.EPW04.NAOK, that.EPW05.NAOK, that.EPW06.NAOK, that.EPW07.NAOK, that.EPW08.NAOK )}

to present the score to the respondent.

Whatever the answers, the sum is always zero.

Could you tell me about the mistakes made?

Thank you.

Hi,
There are several mistakes:
1. As EPW are list radio questions, do dont have to use "that".
"self" or "that" are used for quesions with subquestions, rows, columns.
Manual:

Quite often you want to evaluate all the parts of a question, such as counting how many subquestions have been answered or summing up the scores. Other times you want to process just certain rows or columns of a question (such as getting the row or column sums and storing them in the database). These reserved variables make that process relatively painless.

Let's take an array(numbers) with subquestions (Y001,Y002) and columns (X001,X002,X003)
So "sum(that.Q1)" would be extended to "sum(Q1_Y001_X001,Q1_Y001_X002,Q1_Y001_X003,Q1_Y002_X001,Q1_Y002_X002,Q1_Y002_X003)"

In your case you have a single punch question, So you just use ...?
Yes, what do you use?
As the manual says here:
www.limesurvey.org/manual/ExpressionScri...#Access_to_variables

{EPW01} - the code of the question - an alias for {EPW01.code}
and
{EPW01.code} - the selected response code for the question

2. And here your second mistake.
You do not want to sum up the selected code, but the assessment value.

Again in the manual
{EPW01.value} - the assessment value for the question

So finally your equation is
{sum (EPW01.valueNAOK, EPW02.valueNAOK, EPW03.valueNAOK, EPW04.valueNAOK, EPW05.valueNAOK, EPW06.valueNAOK, EPW07.valueNAOK, EPW08.valueNAOK )}

3. And your third one

I hope to ask my question in the right place

This is obviusly not a "Installation & Update" issue.

Joffm

I move it


Design issues
Please report here if you have questions or problems how to setup your survey.

Thanks Joffm,

The answers and advice were very helpful to me. No mistake. Also, I was able to carry out very varied questionnaires, carry out tests and validation; which explains my late thanks.
Pascal