Millisecond Forums

Hello,

I am trying to figure out how to create a practice block that contains a randomized set of 4 blocks that precedes the actual experiment that is exactly the same except that it contains more trials per block. The only examples I can find online only randomize trials, but I need the blocks to be randomized for this Go/No-Go task. So, I am having problems with defining the exp blocks object.

I also need a specific screen to appear after the practice to tell the participant that the practice is over with and that the real experiment will begin once they press the space bar.

I cannot figure out how to do this. Any help would be most appreciated. My code is posted below:

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   Cued Go / No-Go Task (Fillmore et al., 2006)

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   Configurable values for

   - responsetimeout and

   - ITI (Inter-Trial-Interval)

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<values userparams>

/ responsetimeout = 250

/ iti = 200

/ feedback_time = 400

</values>

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   The below values should not be changed.

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<values taskparams>

/ soa = 0

/ cuetype = 0

/ targettype = 0

/ nogo_targettype = 0

/ go_correctresp = 0

/ nogo_correctresp = 0

/ trialcount = 0

/ total = 0

/ rwd = 10

</values>

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   Task Instructions

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<instruct>

/ windowsize = (80%,80%)

/ inputdevice = keyboard

/ prevkey = (25)

/ nextkey = (57)

/ prevlabel = "Press P to go back"

/ nextlabel = "Press the spacebar"

/ finishlabel = "Press the spacebar"

</instruct>

<page intro>

^^Welcome to the Go / No-Go Task!

^^Put the index finger of your preferred hand on the spacebar. On each trial, a rectangle will appear on the screen.

^The rectangle will either be green or blue.

^^Press the spacebar as quickly as possible whenever you see the green rectangle.

^^If the rectangle is blue, do not respond at all.

^Try to respond as quickly as possible while making as few errors as possible.

^^There will be several practice blocks in the beginning. The task will take about 60 minutes to complete.

^^Press the spacebar to begin.

</page>

<page gainBlockInstr>

^^ WIN BLOCK!

</page>

<page lossBlockInstr>

^^ LOSE BLOCK!

</page>

<page begin>

^^This concludes the Practice for the Go / No-Go Task.

^^Get ready for the actual experiment and press the spacebar when you are ready to begin.

</page>

<page end>

^^This concludes the Go / No-Go Task.

^^Thank you for participating!

</page>

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   Custom Data Output

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<data>

/ columns = [date,time,subject,blocknum,blockcode,values.trialcount,trialcode,response,latency,correct,error,

   picture.cue.currentitem,values.total,picture.target.currentitem,values.cuetype,values.targettype,values.nogo_targettype,values.soa]

/ separatefiles = true

</data>

***********************

Feedback

***********************

<text wrong>

/ items = wrong

/ color = (255, 0, 0)

/ fontstyle = ("Garamond", 36pt, true, false, false, false, 5, 0)

/ position =(50,70)

</text>

<item wrong>

/1 ="-10 Points"                 

</item>

<text right>

/ items = right

/ color = (0, 255, 64)

/ fontstyle = ("Garamond", 36pt, true, false, false, false, 5, 0)

/ position =(50,70)

</text>

<item right>

/1 = "+ 10 Points"

</item>

<text total>  

/ items = total

/ position = (50, 70)

/ txcolor = (0, 0, 0)

</text>

<item total>

/1 = "Total = 200"

</item>

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Block randomization

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   Experiment Elements

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<expt>

/ preinstructions = (intro)

/ postinstructions = (end)

/ blocks = [(1,2,3,4=noreplace(practice_gainBlock, practice_nogo_gainBlock, practice_lossBlock, practice_nogo_lossBlock));

         ;(4,5,6,7=noreplace(gainBlock, nogo_gainBlock, lossBlock, nogo_lossBlock))]

</expt>

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   Block Elements

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<block practice_gainBlock>

/ preinstructions = (gainBlockInstr)

/ bgstim = (total)

/ trials = [1-24=sequence(cue,gain_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1="+ 10 Points"; text.wrong.item.1=" 0 Points" ]

</block>

<block practice_nogo_gainBlock>

/ preinstructions = (gainBlockInstr)

/ bgstim = (total)

/ trials = [1-24=sequence(cue,nogo_gain_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1="+ 10 Points"; text.wrong.item.1=" 0 Points" ]

</block>

<block practice_lossBlock>

/ preinstructions = (lossBlockInstr)

/ trials = [1-24=sequence(cue,loss_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1=" 0 Points"; text.wrong.item.1="- 10 Points" ]

</block>

<block practice_nogo_lossBlock>

/ preinstructions = (lossBlockInstr)

/ trials = [1-24=sequence(cue,nogo_loss_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1=" 0 Points"; text.wrong.item.1="- 10 Points" ]

</block>

<block gainBlock>

/ preinstructions = (gainBlockInstr)

/ bgstim = (total)

/ trials = [1-144=sequence(cue,gain_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1="+ 10 Points"; text.wrong.item.1=" 0 Points" ]

</block>

<block nogo_gainBlock>

/ preinstructions = (gainBlockInstr)

/ bgstim = (total)

/ trials = [1-144=sequence(cue,nogo_gain_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1="+ 10 Points"; text.wrong.item.1=" 0 Points" ]

</block>

<block lossBlock>

/ preinstructions = (lossBlockInstr)

/ trials = [1-144=sequence(cue,loss_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1=" 0 Points"; text.wrong.item.1="- 10 Points" ]

</block>

<block nogo_lossBlock>

/ preinstructions = (lossBlockInstr)

/ trials = [1-144=sequence(cue,nogo_loss_target, iti)]

/ onblockbegin=[values.total=0]

/ onblockbegin=[text.right.item.1=" 0 Points"; text.wrong.item.1="- 10 Points" ]

</block>

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   Counters  ##Changes were made to the factorial design)

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   Note: Factorial design with

   3 x SOA (300,400,500)

   2 x Cue (1=green,2=blue)

   2 x Trial Type (Go, No-Go)

   2 x Block (Gain, Loss)

   Blue cue go / no-go ratio is 4:1 (80% go trials, 20% no-go trials)

   Green cue go / no-go ratio is 1:4 (20% go trials, 80% no-go trials)

   Minimum number of trials required to fulfill the above conditions is 50.

   Task runs 250 trials, i.e., each factor combination is repeated 5 times. ####This has to be changed

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   SOAs in ms  ##Changes made were to reduce SOA from 5 to 3 different ones and I reduced the lines 

   from 25 to 24 so they would be counterbalanced.###

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<list soa>

/ items = (

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400,

   300,300,300,300,300,

   500,500,500,500,500,

   400,400,400,400,400)

</list>

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   Cues (1=vertical cue, 2=horizontal cue)   ###Changed lines from 25 to 24 for counterbalancing##

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<list cuetype>

/ items = (

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2,

   2,2,2,2,2)

/ selectionmode = list.soa.currentindex

</list>

) 

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   Targets (1=horizontal go, 2=horizontal no-go)  ## Changes made were to reduce lines from 25 to 24 for consistentcy###

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<list targettype>

/ items = (

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2,

   1,1,1,1,2)

/ selectionmode = list.soa.currentindex

</list>

<list nogo_targettype>

/ items = (

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1,

   2,2,2,2,1)

/ selectionmode = list.soa.currentindex

</list>

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   Correct Responses (57=spacebar on go trials, 0=no response on no-go trials)

   ####Changes were made by reducing lines from 25 to 24###

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<list go_correctresp>

/ items = (

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0,

   57,57,57,57,0)

/ selectionmode = list.soa.currentindex

</list>

<list nogo_correctresp>

/ items = (

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57,

   0,0,0,0,57)

/ selectionmode = list.soa.currentindex

</list>

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   Trial Elements

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<trial cue>

/ ontrialbegin = [values.soa=list.soa.nextvalue; values.cuetype=list.cuetype.nextvalue;

   values.targettype=list.targettype.nextvalue; values.nogo_targettype=list.nogo_targettype.nextvalue; values.go_correctresp=list.go_correctresp.nextvalue; values.nogo_correctresp=list.nogo_correctresp.nextvalue;

   values.trialcount+=1]

/ stimulustimes = [0=blankscreen; 100=blankscreen]

/ validresponse = (noresponse)

/ trialduration = 100 + values.soa

/ recorddata = false

</trial>

<trial practice_gain_target>

/ stimulustimes = [0=target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.gain_target.response==values.go_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial practice_nogo_gain_target>

/ stimulustimes = [0=nogo_target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.nogo_gain_target.response==values.nogo_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial practice_loss_target>

/ stimulustimes = [0=target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.loss_target.response==values.go_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial practice_nogo_loss_target>

/ stimulustimes = [0=nogo_target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.nogo_loss_target.response==values.nogo_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial gain_target>

/ stimulustimes = [0=target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.gain_target.response==values.go_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial nogo_gain_target>

/ stimulustimes = [0=nogo_target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.nogo_gain_target.response==values.nogo_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial loss_target>

/ stimulustimes = [0=target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.loss_target.response==values.go_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial nogo_loss_target>

/ stimulustimes = [0=nogo_target]

/ validresponse = (57, noresponse)

/ iscorrectresponse = [trial.nogo_loss_target.response==values.nogo_correctresp]

/ correctmessage = true(right,500)

/ errormessage = true(wrong,500)

/ timeout = 550

/ recorddata = true

</trial>

<trial iti>

/ stimulustimes = [0=blankscreen]

/ validresponse = (noresponse)

/ trialduration = values.iti

/ recorddata = false

</trial>

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   Cue Stims  

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<picture cue>

/ items = cues

/ select = values.cuetype

/ size = (75mm,75mm)

/ position = (50%,50%)

/ erase = false

</picture>

<item cues>

/ 2 = "HCUE.bmp"

/ 1 = "HGO.bmp"

</item>

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   Target Stims

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<picture target>

/ items = targets

/ select = values.targettype

/ size = (75mm,75mm)

/ position = (50%,50%)

/ erase = false

</picture>

<picture nogo_target>

/ items = targets

/ select = values.nogo_targettype

/ size = (75mm,75mm)

/ position = (50%,50%)

/ erase = false

</picture>

<item targets>

/ 1 = "HGO.bmp"

/ 2 = "HNOGO.bmp"

</item>

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   Fixation  

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<text fixation>

/ items = ("+")

/ fontstyle = ("Verdana", 10.00%, true)

/ erase = false

</text>

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   Blank Screen

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<shape blankscreen>

/ shape = rectangle

/ color = (white)

/ erase = false

/ size = (100%, 100%)

/ position = (50%, 50%)

</shape>

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   Debug Stuff

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<text debug>

/ txbgcolor = (white)

/ erase = false

/ size = (75%,5%)

/ position = (50%,5%)

</text>

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   Default Settings

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<defaults>

/ canvassize = (100%, 100%)

/ canvasaspectratio = (4,3)

/ minimumversion = "4.0.0.0"

/ fontstyle = ("Verdana", 2.50%, true)

/ screencolor = (white)

</defaults>

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   End Of File

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