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Noreplace does not/will not work for item selection?

AndresR — Mon, 02 Jan 2017 07:36:02 GMT

Hello!

I am trying to run a ST-SB-IAT and I want one block to run each trial once (8 trials) and each trial has 6 items. I want each trial and each item run once, so I've used the noreplace command (?) in both the picture element and in the block element.

Block structure:
<block measureSC>
/trials=            [1-48=noreplacenorepeat(targAhi, targAlo, targBhi, targBlo, SCattrAhi, SCattrAlo, SCattrAhi, SCattrAlo)]
/bgstim=            (label_targA,label_targB, label_SCattrAhi, label_SCattrAlo, divider)
/preinstructions=    (measureSC)
/responsemode =     correct
/onblockend =         [values.SCd = expressions.d]
</block>

Picture element structure:
<picture SCattrAhi> /items = SCattrA /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posHI) /size = (20%, 20%) </picture>
<picture SCattrAlo> /items = SCattrA /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posLO) /size = (20%, 20%) </picture>
<picture targAhi> /items = targA /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posHI) /size = (20%, 20%) </picture>
<picture targAlo> /items = targA /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posLO) /size = (20%, 20%) </picture>
<picture targBhi> /items = targB /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posHI) /size = (20%, 20%) </picture>
<picture targBlo> /items = targB /select = noreplacenorepeat /resetinterval = 0 /position = (50, values.posLO) /size = (20%, 20%) </picture>

I know that the SCattr trials are in there twice - that's supposed to be like that. I want every picture in the items list to be presented like this: SCattrAhi x2; SCattrAlo x2, targAhi x1; targAlo x1; targBhi x1; targBlo x1.

What am I doing wrong? I've scavenged through the threads on this forum that mention these topics but none of the fixes have helped me so far.

RE: Noreplace does not/will not work for item selection?

Dave — Mon, 02 Jan 2017 07:36:02 GMT

[quote]

[b]AndresR - Saturday, December 31, 2016[/b]

I couldn't figure out how to edit the first post so I'll add the info I forgot.

I want every picture in the items list to be presented like this: SCattrAhi x2; SCattrAlo x2, targAhi x1; targAlo x1; targBhi x1; targBlo x1. Instead some SCattrA pictures are presented 5 times, instead of 4, in turn, some are presented 3 times. I need each picture to be presented an equal number of times.

[/quote]

/trials= [1-48=noreplacenorepeat(targAhi, targAlo, targBhi, targBlo, SCattrAhi, SCattrAlo, SCattrAhi, SCattrAlo)]

What this does is run
6 targAhi trials,
6 targAlo trials,
6 targBhi trials,
6 targBlo trials,
12 SCattrAhi trials, and
12 SCattrAlo trials.

Item selection is a different matter; this would be determined by the respective <picture> elements' /select attributes.

Try explicitly resetting the <picture> elements' selection /onblockbegin:

<block measureSC>
/ onblockbegin = [picture.SCattrAhi.resetselection(); picture.SCattrAlo.resetselection(); ...]
...
</block>

Also make sure that the <trial> elements actually display the correct <picture> elements, i.e., <trial SCattrAhi> should display <picture SCattrAhi>

<trial SCattrAhi>
/ stimulusframes = [1=SCattrAhi]
...
</trial>

and so forth.

RE: Noreplace does not/will not work for item selection?

AndresR — Sat, 31 Dec 2016 04:03:02 GMT