Millisecond Forums

Hey all, 

I want to create a personality questionnaire with Inquisit.
I've used radiobuttons for the items, here an example:

<radiobuttons SRSI_03_XCo>
/ caption = "Meine Gedächtnisleistungen haben sehr nachgelassen."
/ fontstyle = ("Times New Roman", -35)
/ options = ("richtig", "falsch")
/ optionvalues = ("1", "0")
/ responsefontstyle = ("Times New Roman", -25)
/ orientation = vertical
/ required = true
</radiobuttons>

Then I created for each Item a surveypage.
Now I want to give feedback about the score that the participant has reached. For this I need to sum up all the answers, where the participant said "richtig" (which is scored through the optionvalues as "1").

I tried doing it like this :

Sie haben auf der Skala Kognitive Beschwerden einen Summenwert von <%radiobuttons.SRSI_03_XCo.response+radiobuttons.SRSI_10_XCo.response+radiobuttons.SRSI_16_XCo+radiobuttons.SRSI_32_XCo.response+radiobuttons.SRSI_41_XCo.response+radiobuttons.SRSI_46_XCo.response+radiobuttons.SRSI_57_XCo.response+radiobuttons.SRSI_64_XCo.response+radiobuttons.SRSI_80_XCo.response+radiobuttons.SRSI_104_XCo.response%>.

But Inquisit says: "Expression contains an invalid identifier"
I also tried it with radiobuttons.....selectedvalue or radiobuttons...optionvalue, but neither worked.

Can somebody help me out, where I made an error?

Thank you all a lot!