Millisecond Forums

Thank you, Dave.

The only reason I can think of is that your script contains a mistake. It is extremely unlikely that there is something wrong with 'noreplace' if applied as discussed previously in this thread.

That's what it would be supposed to, but it does not.. :(  So the script is correct?! Could you imagine another reason for this error? (There are no repeating images in my data folder which could have been a reason..)

Nevertheless, thanks a lot for your help.

Your block will 6 x <trial neg50_1>. If you examine those six trials in your data file, I am sure you will find that each of the files defined in <picture Neg50_1> is displayed exactly once. That's what your script is set up to do.

Thank you very much, Dave.

I think both of them are true..

The structure of my script is the following one:

<picture Neg50_1>

/items =  ("Neg001.jpg","Neg002.jpg","Neg003.jpg","Neg004.jpg","Neg005.jpg","Neg006.jpg")

/select = noreplace

</picture>

(defining another 74 picture sets like this..)

<trial neg50_1>

/stimulusframes= [1=Neg50_1, PORTneg50; 4=cruz, PORTlimpiar]

/numframes=63

/validresponse= (noresponse)

/timeout=1050

</trial>

(one trial for each picture defined before..)

This would be true under two conditions: (1) No other <trial> elements sample from <picture Neg_1> AND (2) all 6 <trial neg1> runs occur in the *same* <block>. By default, selection pools are reset between blocks, please see the documentation for /resetinterval for details.

/ validresponse = (noresponse)

Hello,

I have another problem with the random presentation of pictures.

I defined a picture set as:

<picture Neg_1>

/items =  ("Neg001.jpg","Neg002.jpg","Neg003.jpg","Neg004.jpg","Neg005.jpg","Neg006.jpg")

/select = noreplace

</picture>

And a corresponding trial as:

<trial neg1>

/stimulusframes= [1=Neg_1, PORTneg_1; 4=cruz, PORTclean]

/numframes=63

</trial>

Presenting this trial six times, I would expect Inquisit to present each of my pictures once, without replacement. But there are always some images that appear twice and others that do not appear. What’s wrong?

On the other hand, I was wondering if there would be necessary any other line to define my trial, taking into account that there won’t be any response inputs (the participants will only be viewing the images).

Thank you very much,

Dominique

Yep, that worked.  Thanks for your help.

Why all those <counter> elements now? You do not need more than you already had. What you needed more of are <picture> and <item> elements.

For the record: One counter for white pics, one for black, one for accept, one for reject. Your various trials in the pairings block will randomly distribute them across the proper <item> elements.

Yes, the following code gives me what I want if I define subsets:

<picture accept_pics_white1>

/ items = accept_pics_white1

/select=noreplace

</picture>

<picture accept_pics_black1>

/ items = accept_pics_black1

/select=noreplace

</picture>

<picture reject_pics_white1>

/ items = reject_pics_white1

/select=noreplace

</picture>

<picture reject_pics_black1>

/ items = reject_pics_black1

/select=noreplace

</picture>

<picture white_pics_accept1>

/ items = white_pics_accept1

/ select = current(accept_pics_white1)

</picture>

<picture black_pics_accept1>

/ items = black_pics_accept1

/ select = current(accept_pics_black1)

</picture>

<picture white_pics_reject1>

/ items = white_pics_reject1

/ select = current(reject_pics_white1)

</picture>

<picture black_pics_reject1>

/ items = black_pics_reject1

/ select = current(reject_pics_black1)

</picture>

<item accept_pics_white1>

</item>

<item accept_pics_black1>

</item>

<item reject_pics_white1>

</item>

<item reject_pics_black1>

</item>

<item white_pics_accept1>

</item>

<item black_pics_accept1>

</item>

<item white_pics_reject1>

</item>

<item black_pics_reject1>

</item>

<counter setup_accept_pics_white1>

/ items = ("App14_1Template.jpg", "App14_2Template.jpg", "App14_3Template.jpg", "App14_4Template.jpg",

"App14_5Template.jpg", "App14_6Template.jpg", "App14_7Template.jpg", "App14_8Template.jpg",

"App14_9Template.jpg", "App14_10Template.jpg")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_accept_pics_black1>

/ items = ("App14_10Template.jpg", "App14_11Template.jpg", "App14_12Template.jpg",

"App14_13Template.jpg", "App14_14Template.jpg", "App14_15Template.jpg", "App14_16Template.jpg",

"App14_17Template.jpg", "App14_18Template.jpg", "App14_19Template.jpg", "App14_20Template.jpg")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_reject_pics_white1>

/ items = ("App13_1Template.jpg", "App13_2Template.jpg", "App13_3Template.jpg", "App13_4Template.jpg",

"App13_5Template.jpg", "App13_6Template.jpg", "App13_7Template.jpg", "App13_8Template.jpg",

"App13_9Template.jpg", "App13_10Template.jpg")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_reject_pics_black1>

/ items = ("App13_11Template.jpg", "App13_12Template.jpg",

"App13_13Template.jpg", "App13_14Template.jpg", "App13_15Template.jpg", "App13_16Template.jpg",

"App13_17Template.jpg", "App13_18Template.jpg", "App13_19Template.jpg", "App13_20Template.jpg")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_white_pics_accept1>

/ items = ("W1S.bmp", "W2S.bmp", "W3S.bmp", "W4S.bmp",

"W5S.bmp", "W6S.bmp", "W8S.bmp", "W9S.bmp",

"W11S.bmp", "W13S.bmp")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_white_pics_reject1>

/ items = ("W19S.bmp", "W20S.bmp",

"W21S.bmp", "W23S.bmp", "W25S.bmp", "W26S.bmp",

"W28S.bmp", "W30S.bmp", "W31S.bmp", "W37S.bmp")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_black_pics_accept1>

/ items = ("B1S.bmp", "B2S.bmp", "B3S.bmp", "B4S.bmp",

"B5S.bmp", "B6S.bmp", "B8S.bmp", "B9S.bmp",

"B10S.bmp", "B12S.bmp")

/ select = noreplace

/ selectionrate = trial

</counter>

<counter setup_black_pics_reject1>

/ items = ("B984S.bmp", "B985S.bmp",

"B986S.bmp", "B987S.bmp", "B988S.bmp", "B990S.bmp",

"B991S.bmp", "B993S.bmp", "B994S.bmp", "B997S.bmp")

/ select = noreplace

/ selectionrate = trial

</counter>

<trial setup_pairingsaw>

/ ontrialbegin = [item.accept_pics_white1.item=counter.setup_accept_pics_white1.selectedvalue]

/ ontrialbegin = [item.white_pics_accept1.item=counter.setup_white_pics_accept1.selectedvalue]

/ trialduration = 0

/ recorddata = false

</trial>

<trial setup_pairingsab>

/ ontrialbegin = [item.accept_pics_black1.item=counter.setup_accept_pics_black1.selectedvalue]

/ ontrialbegin = [item.black_pics_accept1.item=counter.setup_black_pics_accept1.selectedvalue]

/ trialduration = 0

/ recorddata = false

</trial>

<trial setup_pairingsrw>

/ ontrialbegin = [item.reject_pics_white1.item=counter.setup_reject_pics_white1.selectedvalue]

/ ontrialbegin = [item.white_pics_reject1.item=counter.setup_white_pics_reject1.selectedvalue]

/ trialduration = 0

/ recorddata = false

</trial>

<trial setup_pairingsrb>

/ ontrialbegin = [item.reject_pics_black1.item=counter.setup_reject_pics_black1.selectedvalue]

/ ontrialbegin = [item.black_pics_reject1.item=counter.setup_black_pics_reject1.selectedvalue]

/ trialduration = 0

/ recorddata = false

</trial>

<trial orientaw>

/ stimulusframes = [1=accept_pics_white1,white_pics_accept1]

/timeout=100

</trial>

<trial orientab>

/ stimulusframes = [1=accept_pics_black1,black_pics_accept1]

/timeout=100

</trial>

<trial orientrw>

/ stimulusframes = [1=reject_pics_white1,white_pics_reject1]

/timeout=100

</trial>

<trial orientrb>

/ stimulusframes = [1=reject_pics_black1,black_pics_reject1]

/timeout=100

</trial>

<trial testaw>

/ stimulusframes = [1=accept_pics_white1,AcceptButton,RejectButton,white_pics_accept1]

/ correctresponse = (AcceptButton)

/ validresponse = (AcceptButton,RejectButton)

/timeout=100

</trial>

<trial testab>

/ stimulusframes = [1=accept_pics_black1,AcceptButton,RejectButton,black_pics_accept1]

/ correctresponse = (AcceptButton)

/ validresponse = (AcceptButton,RejectButton)

/timeout=100

</trial>

<trial testrw>

/ stimulusframes = [1=reject_pics_white1,AcceptButton,RejectButton,white_pics_reject1]

/ correctresponse = (RejectButton)

/ validresponse = (AcceptButton,RejectButton)

/timeout=100

</trial>

<trial testrb>

/ stimulusframes = [1=reject_pics_black1,AcceptButton,RejectButton,black_pics_reject1]

/ correctresponse = (RejectButton)

/ validresponse = (AcceptButton,RejectButton)

/timeout=100

</trial>

<block pairings>

/ trials = [1-40=noreplace(setup_pairingsaw,setup_pairingsab,setup_pairingsrw,setup_pairingsrb)]

</block>

<block orient>

/ trials = [1-40=noreplace(orientaw,orientrw,orientab,orientrb)]

</block>

<block test>

/ trials = [1-40=noreplace(testaw,testrw,testab,testrb)]

</block>

But this still isn't random.  I could make more orders (pairing the first 10 White faces with the last 10 acceptance profiles, etc.) and then randomly assign participants to orders, so that each face is equally likely to be paired with any other application, but it is still not fully random.  If you don't have any other solution, that will work.  But please let me know if I am missing out on something here that could get fully random selection. Thanks for your help.