Millisecond Forums

<expt>

Hi, Dave,

Thank you so much!

Sincerely,

Ashley

Hi- I tried to follow these instructions to counterbalance blocks in my experiment, but it showed a single trial of the first block and then would not progress. Could you specify whether the /blocks list has to be in a different format (e.g. /blocks = [1=A; 2=B; 3=C] or if there is something else that I am missing? Thanks!

Precise syntax specifications for the /blocks attribute are available in the language reference for the /blocks attribute.

Hi Dave- it isn't working and I used the correct syntax, I think. This is what I did:<expt>
/blocks = [1=instruct; 2=choice2 ;3=choice; 4=choice3;5= end2]
/subjects = (1 of 3)
/groupassignment =  random
</expt>

<expt>
/blocks = [1=instruct; 2=choice ;3=choice2; 4=choice3;5= end2]
/subjects = (2 of 3)
/groupassignment =  random
</expt>

<expt>
/blocks = [1=instruct; 2=choice3 ;3=choice; 4=choice2;5= end2]
/subjects = (3 of 3)
/groupassignment =  random
</expt>

Then the syntax in your /blocks attributes is not the problem, but there's some other mistake in your script. Can't tell you what that is without you providing the relevant code.

Hi Dave- thanks so much for your help with this- I'm at a loss. This is the rest of the script, minus instructions.********* DEFINE BLOCKS
<block choice>
/trials = [1-20=mytrial]
</block>

<block choice2>
/trials = [1-20=mytrial2]
</block>

<block choice3>
/trials = [1-10=mytrial3]
</block>

<block instruct>
/trials = [1=instruct]
</block>

<block end2>
/trials = [1=end2]
</block>

*********
CHOICE

<list hpositionlist>
/items = (35%,65%)
/selectionmode = random
/selectionrate = always
</list>

<trial mytrial>
/ stimulusframes = [1=a,b]
/ inputdevice = mouse
/ validresponse = (a, b)
</trial>

<picture a>
/items = lista
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist.nextvalue
/ vposition = 50%
</picture>

<picture b>
/items = listb
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist.nextvalue
/ vposition = 50%
</picture>


<item lista>
/1 = "m69.bmp"
/2 = "H39.bmp"
/3= "m36.bmp"
/4 = "m61.bmp"
/5 = "H06.bmp"
/6 = "m47.bmp"
/7 = "H42.bmp"
/8 = "H52.bmp"
/9 = "m65.bmp"
/10 = "m53.bmp"
/11= "m21.bmp"
/12= "m12.bmp"
/13 = "m92.bmp"
/14 = "m35.bmp"
/15 = "H61.bmp"
/16= "m76.bmp"
/17 = "m42.bmp"
/18 ="H32.bmp"
/19 = "H69.bmp"
/20 = "m29.bmp"
</item>


<item listb>
/1 = "k31.bmp"
/2 = "c12.bmp"
/3 = "017.bmp"
/4 = "082.bmp"
/5 = "059.bmp"
/6 = "142.bmp"
/7 = "k47.bmp"
/8 = "143.bmp"
/9 = "k09.bmp"
/10 = "k65.bmp"
/11= "k31.bmp"
/12= "c12.bmp"
/13= "017.bmp"
/14= "082.bmp"
/15= "059.bmp"
/16= "142.bmp"
/17= "k47.bmp"
/18= "143.bmp"
/19= "k09.bmp"
/20 = "k65.bmp"
</item>

<trial mytrial2>
/ stimulusframes = [1=a2,b2]
/ inputdevice = mouse
/ validresponse = (a, b)
</trial>

<picture a2>
/items = lista2
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist2.nextvalue
/ vposition = 50%
</picture>

<picture b2>
/items = listb2
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist2.nextvalue
/ vposition = 50%
</picture>

<list hpositionlist2>
/items = (35%,65%)
/selectionmode = random
/selectionrate = always
</list>

<item lista2>
/1 = "m69.bmp"
/2 = "H39.bmp"
/3= "m36.bmp"
/4 = "m61.bmp"
/5 = "H06.bmp"
/6 = "m47.bmp"
/7 = "H42.bmp"
/8 = "H52.bmp"
/9 = "m65.bmp"
/10 = "m53.bmp"
/11= "m21.bmp"
/12= "m12.bmp"
/13 = "m92.bmp"
/14 = "m35.bmp"
/15 = "H61.bmp"
/16= "m76.bmp"
/17 = "m42.bmp"
/18 ="H32.bmp"
/19 = "H69.bmp"
/20 = "m29.bmp"
</item>

<item listb2>
/1 = "m87.bmp"
/2 = "m68.bmp"
/3 = "H70.bmp"
/4 = "H28.bmp"
/5 = "H25.bmp"
/6 ="m10.bmp"
/7= "m30.bmp"
/8 = "H14.bmp"
/9 = "m14.bmp"
/10 = "H37.bmp"
/11 = "H37.bmp"
/12 = "m87.bmp"
/13 = "m68.bmp"
/14 = "H70.bmp"
/15 = "H28.bmp"
/16 = "H25.bmp"
/17 ="m10.bmp"
/18= "m30.bmp"
/19 = "H14.bmp"
/20 = "m14.bmp"
</item>


*** LOOK ***
<trial mytrial3>
/ stimulusframes = [1=c,d]
/ inputdevice = mouse
/ validresponse = (a, b)
</trial>

<picture c>
/items = listc
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist3.nextvalue
/ vposition = 50%
</picture>

<picture d>
/items = listd
/ size = (500,500)
/ erase = true (0,0,0)
/ select = noreplacenorepeat
/ hposition = list.hpositionlist3.nextvalue
/ vposition = 50%
</picture>

<list hpositionlist3>
/items = (35%,65%)
/selectionmode = random
/selectionrate = always
</list>

<item listc>
/1 = "k31.bmp"
/2 = "c12.bmp"
/3 = "017.bmp"
/4 = "082.bmp"
/5 = "059.bmp"
/6 = "142.bmp"
/7 = "k47.bmp"
/8 = "143.bmp"
/9 = "k09.bmp"
/10 = "k65.bmp"
</item>

<item listd>
/1 = "m87.bmp"
/2 = "m68.bmp"
/3 = "H70.bmp"
/4 = "H28.bmp"
/5 = "H25.bmp"
/6 ="m10.bmp"
/7= "m30.bmp"
/8 = "H14.bmp"
/9 = "m14.bmp"
/10 = "H37.bmp"
</item>

Can you please *attach* (not copy & paste) the *entire script*? Thanks.

FWIW, look at your <trial> elements:<trial mytrial2>
/ stimulusframes = [1=a2,b2]
/ inputdevice = mouse
/ validresponse = (a, b)
</trial>The above trial does *not* display any objects called "a" and "b", thus/ validresponse = (a, b)cannot possibly work. Same here