Millisecond Forums

Here's an example, several variations along the same lines are possible. Basically, whatever you can pull off with <picture> elements, you can pull off with a combination of <picture> (displayed offscreen) and <image> elements as well:

<block myblock>
/ trials = [1-3 = sequence(a,b,c,d)]
</block>

<item picitems>
/ 1 = "01.jpg"
/ 1 = "02.jpg"
/ 1 = "03.jpg"
</item>

<picture mypicture>
/ items = picitems
/ position = (-20%,-20%)
/ size = (0%, 0%)
</picture>

<image myimage>
/items = ("<%picture.mypicture.currentitem%>")
/ imagesize = (50%, 40%)
</image>

<surveypage a>
/ stimulusframes = [1=mypicture]
/ caption = "Page A"
/ questions = [1=myimage; 2=slider_a]
/ showquestionnumbers = false
/ showpagenumbers = false
</surveypage>

<surveypage b>
/ caption = "Page B"
/ questions = [1=myimage; 2=slider_b]
/ showquestionnumbers = false
/ showpagenumbers = false
</surveypage>

<surveypage c>
/ caption = "Page C"
/ questions = [1=myimage; 2=slider_c]
/ showquestionnumbers = false
/ showpagenumbers = false
</surveypage>

<surveypage d>
/ caption = "Page D"
/ questions = [1=myimage; 2=slider_d]
/ showquestionnumbers = false
/ showpagenumbers = false
</surveypage>

<slider slider_a>
/ required = true
/ slidersize = (50%, 10%)
</slider>

<slider slider_b>
/ required = true
/ slidersize = (50%, 10%)
</slider>

<slider slider_c>
/ required = true
/ slidersize = (50%, 10%)
</slider>

<slider slider_d>
/ required = true
/ slidersize = (50%, 10%)
</slider>

O.K. thanks. I will do that
Shlomo

Thanks much
But this is a very problematic way to go about it since I need to present the same picture across different pages and I need to select it randomly from a set of items. 
I think I will stay with the picture and required- false although this is problematic.  

It's not a problem at all to (a) select an item randomly, and then (b) present the same item across different pages with this approach.

Thanks much
But this is a very problematic way to go about it since I need to present the same picture across different pages and I need to select it randomly from a set of items. 
I think I will stay with the picture and required- false although this is problematic.  

The solution is to show the picture on the surveypage via an <image> element displayed via the page's /questions attribute, not a <picture> displayed via /stimulusframes.

I.e.
<surveypage mypage>
/ questions = [1=myimage; 2=myslider]
....
</surveypage>

with

<image myimage>
/ items = ("example.jpg")
/ imagesize = (50%, 20%)
</image>

instead of

<surveypage mypage>
/ stimulusframes = [1=mypicture]
/ questions = [1=myslider]
....
</surveypage>

with

<picture mypicture>
/ items = ("example.jpg")
...
</picture>

If you run the page via a <block> and need to display it repeatedly during the block with different images selected, you can do something like this:

<block myblock>
/ trials = [1-5=Explicit1]
</block>

<item valence>
/1 = "prime_lit1.jpg"
/2 = "prime_lit2.jpg"
/3 = "prime_lit3.jpg"
/4 = "prime_lit4.jpg"
/5 = "prime_lit5.jpg"
</item>

<picture valpic>
/ items = valence
/ position = (-20%,-20%)
</picture>

<image val>
/items = ("<%picture.valpic.currentitem%>")
/ position = (6.25%,2%)
/ imagesize = (50%, 20%)
</image>

<slider slid_val>
/ fontstyle = ("Arial", 4%)
/ position = (14%, 75%)
/ labels = ("Negative", "Positive")
/ range = (1,9)
/ slidersize = (60%, 6%)
/ showtooltips = false
/ required = true
</slider>

<surveypage Explicit1>
/ stimulusframes = [1=valpic]
/ fontstyle = ("Arial", 3%, false, true)
/ questions=[1=val;2=slid_val]
/ showpagenumbers = false
/ showquestionnumbers = false
/ finishlabel = "Next"
/ nextbuttonposition = (60%, 90%)
</surveypage>