Issue with Overlapping Locations


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ldb24
ldb24
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Posts: 13, Visits: 47
I'm working on a task that will show either 4, 5, or 8 colored squares on the screen. I'm having an issue though with the location assignment as occasionally I will get a trial with 3, 5, or 7 items (though I did get one 2). I figured out that on some trials items are getting assigned to the same location. 

Thing is I've been using some variant of this script for a while and never had the issue. I've modeled it after the ChangeBlindness script on the task library and I think I have everything set up the same way. The relevant bits are:

<values>
/column1_x = 45%
/column2_x = 50%
/column3_x = 55%
/column4_x = 60%
/row1_y = 45%
/row2_y = 50%
/row3_y = 55%

/object1_x = 0
/object2_x = 0
/object3_x = 0
/object4_x = 0
/object5_x = 0
/object6_x = 0
/object7_x = 0
/object8_x = 0

/object1_y = 0
/object2_y = 0
/object3_y = 0
/object4_y = 0
/object5_y = 0
/object6_y = 0
/object7_y = 0
/object8_y = 0
</values>

<picture object1>
/items = objects
/select = values.object1
/hposition = values.object1_x
/vposition = values.object1_y
/size = (20,20)
</picture>

<picture object2>
/items = objects
/select = values.object2
/hposition = values.object2_x
/vposition = values.object2_y
/size = (20,20)
</picture>

<picture object3>
/items = objects
/select = values.object3
/hposition = values.object3_x
/vposition = values.object3_y
/size = (20,20)
</picture>

<picture object4>
/items = objects
/select = values.object4
/hposition = values.object4_x
/vposition = values.object4_y
/size = (20,20)
</picture>

<picture object5>
/items = objects
/select = values.object5
/hposition = values.object5_x
/vposition = values.object5_y
/size = (20,20)
</picture>

<picture object6>
/items = objects
/select = values.object6
/hposition = values.object6_x
/vposition = values.object6_y
/size = (20,20)
</picture>

<picture object7>
/items = objects
/select = values.object7
/hposition = values.object7_x
/vposition = values.object7_y
/size = (20,20)
</picture>

<picture object8>
/items = objects
/select = values.object8
/hposition = values.object8_x
/vposition = values.object8_y
/size = (20,20)
</picture>

<list screencoordinates_x>
/items = (values.column1_x, values.column1_x, values.column1_x,
values.column2_x, values.column2_x, values.column2_x,
values.column3_x, values.column3_x, values.column3_x,
values.column4_x, values.column4_x, values.column4_x)
/replace = false
/selectionrate = always
</list>

<list screencoordinates_y>
/items = (values.row1_y, values.row2_y, values.row3_y, values.row4_y,
values.row1_y, values.row2_y, values.row3_y, values.row4_y,
values.row1_y, values.row2_y, values.row3_y, values.row4_y)
/ selectionmode= list.screencoordinates_x.currentindex
/ selectionrate = always
</list>

<trial createarray>
/ontrialbegin = [if (values.numberofobjects >= 1) {values.object1 = list.arrayobjects.nextvalue; values.object1_x = list.screencoordinates_x.nextvalue; values.object1_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 2) {values.object2 = list.arrayobjects.nextvalue; values.object2_x = list.screencoordinates_x.nextvalue; values.object2_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 3) {values.object3 = list.arrayobjects.nextvalue; values.object3_x = list.screencoordinates_x.nextvalue; values.object3_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 4) {values.object4 = list.arrayobjects.nextvalue; values.object4_x = list.screencoordinates_x.nextvalue; values.object4_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 5) {values.object5 = list.arrayobjects.nextvalue; values.object5_x = list.screencoordinates_x.nextvalue; values.object5_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 6) {values.object6 = list.arrayobjects.nextvalue; values.object6_x = list.screencoordinates_x.nextvalue; values.object6_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 7) {values.object7 = list.arrayobjects.nextvalue; values.object7_x = list.screencoordinates_x.nextvalue; values.object7_y = list.screencoordinates_y.nextvalue}]
/ontrialbegin = [if (values.numberofobjects >= 8) {values.object8 = list.arrayobjects.nextvalue; values.object8_x = list.screencoordinates_x.nextvalue; values.object8_y = list.screencoordinates_y.nextvalue}]
</trial createarray>


Any insights as to why I'm sometimes getting items assigned to the same location? I've fiddled with this for a while and keep coming up with the same outcome. I left out the parts of the script that don't have to do with location but let me know if the full script is needed.

Thanks!
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