Millisecond Forums

Hi! It’s my first time programming an experiment and I’m having some troubles with /iscorrectresponse.
I have a surveypage with a picture and two questions, a checkbox and a radiobuttons.
I would like to define the correct answers in the practice part with an error-correct message, but I don’t understand how to do it.
I need that the correctmessage appears only when there are correct answers in both questions. So only if participants reply “no” in checkboxes AND “100%” in radiobuttons. I have tried several combinations in /iscorrectresponse with different expressions but it seems that the correct answers are always wrong!
Could you help me please?
Thank you in advance!
Francesca

<checkboxes didyousee_practice>
/ caption="Did you see this person at the beginning?"
/ required = true
/ options=("yes", "no")
/position = (10, 10)
/range = (1,1)
/ correctresponse = ("no")
</checkboxes>

<radiobuttons howmuch_practice>
/ caption="How certain are you? I am ...% certain"
/ options=("0%", "10%", "20%", "30%", "40%", "50%", "60%", "70%", "80%", "90%", "100%")
/ required=true
/position = (10, 30)
/ correctresponse = ("100%")
</radiobuttons>

<surveypage practice_item>
/stimulusframes = [1 = practice_item]
/questions = [1-2= sequence (didyousee_practice, howmuch_practice)]
/ontrialbegin = [picture.practice_item]
/itemspacing = 2
/recorddata = true
/iscorrectresponse = ???
/ correctmessage = true(good, 3000)
/ errormessage = true(wrong, 10000)
</surveypage>

<text wrong>
/ items = ("WRONG!
This person is not the girl in the presentation at the beginning of the experiment!
The correct answer is no. I'm 100% certain of my answer")
</text>

<text good>
/items= ("GOOD!")
</text>

<block practice_item>
/preinstructions = (instructions)
/postinstructions = (endpractice)
/trials = [1-3 = practice_item]
/responsemode = correct
</block>