Is it possible to sum assessment value and visualize the results in the statistics or in the responses table?
How to do it?

Read the manual about access to variables
www.limesurvey.org/manual/ExpressionScri...#Access_to_variables
to see which property you need to access the assessment value.

Read the manual about implemented functions
www.limesurvey.org/manual/ExpressionScri...mplemented_functions
to find the appropriate function for your needs.

Then you may create a question of type equation to calculate your score, like
{sum(Q1.valueNAOK,Q2.NAOK,if(Q3_SQ001=="Y",10,0),...)} or whatever.

This way the calculated value will be stored in the data table.

If you want it to be shown in the "statistics" you have to assign it to a question (type "numerical input"), like
{QResult=sum(Q1.valueNAOK,Q2.NAOK,if(Q3_SQ001=="Y",10,0),...)}

Thanks for the info, but I am unable to find the answers to my questions in the manual. My survey consists of Radio List questions. Each question has 4 possible answers. 1 answer is correct. Correct answers in the field Assessment value I entered 1, incorrect ones contain 0 (scree1). However, in the logic view the value of questions is equal to 0 (screen2). Can I count on a more detailed answer? Where and how can I define the logic so that each correct answer is written down so that I can sum up all the correct answers. I do not want to show this result to the respondents. I want to have access to it in the answer table or anywhere in the admin panel.

Did you enable assessments in the "Notifications & data" settings?