My survey contains a question group of 100 similar radio list questions. I am looking to add an equation question that reads the responses to 10 of these questions and sums the values of their answer option codes.

For example, assuming the radio list questions take the form:
… if survey participant answers "Disagree" for all question codes a1 through a10, I would like to write 20 to the database (2 ("disagree") x 10 (number of questions) = 20). The answers are ordered consistently, so a solution that uses the answer index instead of the answer option code is acceptable. I'm really looking to avoid using JavaScript.

Thank you!

Hi,

Withouts assessments :
{sum(str_replace("A","",Q1.NAOK),str_replace("A","",Q2.NAOK),str_replace("A","",Q3.NAOK), ...)}

With assessments:
{sum(Q1.valueNAOK,Q2.valueNAOK,Q3.value,)}

Or {ASSESSMENT_CURRENT_TOTAL} If you have only this question type.
manual.limesurvey.org/Assessments#Assessment_placeholders

Denis

That worked exactly as hoped and is very clear. Thank you so much! In case anyone else runs into a similar problem, there is some relevant discussion of sum() and NAOK in Expression Management HowTos .