we want to program a rating-experiment: StimPic - one question - two sliders - two sliderpics as labels. Its solved with a surveypage. Problem is  "/ required=true" in sliders. If no answer is selected (sliders not moved) and NEXT-click, only the sliders and the caption (/ questions) are visible. The StimPic and the slider-label-pics (/ stimulusframes) are invisible.What is my error in reasoning?/ 1= "b1.jpg"
/ 2= "b2.jpg"
/ 3= "b3.jpg"
</item>

<picture stim>
/ items = bild
/ position = (50%, 25%)
/ size = (60%, 60%)
</picture>

<text prequest>
/ items = ("How do you feel?")
/ hjustify = left
/ fontstyle = ("Arial", 2%, true, false, false, false, 5, 255)
/ txcolor = (black)
/ txbgcolor = (white)
/ position = (50%, 55%)
</text>

<caption textar>
/ txcolor = black
/ caption="Level of internal excitation"
/ fontstyle = ("Arial", 1.5%, true, false, false, false, 5, 255)
/ position = (19%, 61%)
</caption>

<picture par>
/ items = ("SAM-A9.png")
/ halign = left
/ valign = top
/ position = (4%, 66%)
/ size = (40%, 40%)
/ erase = false
</picture>

<slider sar>
/ range = (1, 9)
/ position = (6%, 78%)
/ slidersize= (36%, 10%)
/ showtooltips = false
/ required = true
</slider>

<caption textva>
/ caption="Valence"
/ fontstyle = ("Arial", 1.5%, true, false, false, false, 5, 255)
/ position = (67%, 61%)
</caption>

<picture pva>
/ items = ("SAM-V9.png")
/ halign = left
/ valign = top
/ position = (48%, 66%)
/ size = (40%, 40%)
</picture>

<slider sva>
/ range = (1, 9)
/ position = (51%, 78%)
/ slidersize= (36%, 10%)
/ showtooltips = false
/ required=true
</slider>

<surveypage spage>
/ finishlabel = "Next"
/ stimulusframes = [1=stim;2=prequest;3=par;4=pva]
/ questions = [1=sar;2=sva;3=textar;4=textva]
</surveypage>

<block pre>
/ trials = [1-3=spage]
</block>

<expt>
/ blocks = [1=pre]
</expt>

which, unfortunately, may result in an (ugly) pinkish rendering artifact around the <slider> controls. Perhaps you can live with that, though, for the time being.Hope this helps.