Hi!

I asked my respondents a few questions with 04 options each

For example,
"Which one is the largest state in area? Texas, Alaska, Delaware, Maine"
"Which state is located in the West coast? California, Nevada, New York, Illinois"
...
...
I want to develop a measure of "Geography Knowledge". What is the standard practice or tools that are used frequently? If you can provide some link to published work that will do too.

I am doing some obvious one such as,
1) Dummy for correct answer - adding the correct answer dummy for each respondents.
2) Rank of correct answers - such as for the first question - Alaska (4), Texas (3), Maine (2), Delaware (1).

Problem is, I am assuming equal distance between the "correctness" of the answers. For example, I want to give more points to Texas (more than 03) and less point to someone who answered Delaware as the largest state (less than 01).

PS. I do know the correct answers to each question.