Nested Image List Errors

[Nicole Zabik]

Hi all!

Long-time lurker, first time poster. I am attempting to have fun with nested lists, and it isn't that fun.

The Issue: EPrime-3 does not recognize when I call on my nested image lists. Throws me an error saying it "cannot resolve [Image] in the context".

The experiment: participants either choose to see a series of negative or positive images (5 images displayed after a response to a cue).

The nested image lists: I have PRE-randomized 100 positive and negative images to be chosen in that order, so that theoretically each participant sees a variety of images regardless of their response in the last trial(s).

Overall experiment set-up (see also "fullexp.png):

>SessionProc

>>Lists

   CueList (list of cues used)

   PositiveImageList (pre-randomized positive images)

   NegativeImageList (pre-randomized negative images)

   BlankImageList (one blank image that trials can cycle through)

>>MainProc

>>>PositiveProc (all procs set up this way)

          Instructions

          PositiveTrialList (positivetrial.png)

             PositiveTrialProc (triallist.png)

Troubleshooting: 

• Other experiments run correctly on the computer/in Eprime.
• I have tried using [PImage] and [Image1] to call on column attributes and I get the same error.
• I have tried <[PImage]> and <[Image1]> for feedback displays and it still throws an error.
• I have tried placing ImageLists inside MainProc, and still get an error (attached full experiment as fullexp.png)
• I have c.setattrib for my cues but am wondering if that would work to call on the nested lists. (c.SetAttrib "Negative", "negativecue.bmp")

Additional question: what is the best way to pre-load 5 images once a participant gives a correct response (vs. waiting for the list to load on the fly)?

Many thanks! Hopefully this is enough info to troubleshoot together.

[McFarlane, David]

As far as I can tell, your PositiveTrialList includes attribute references for PImage, and I suppose that the PImage column occurs in your PositiveImageList, etc.

In that case, I think that PositiveImageList, etc., should be nested within PositiveTrialList.

In fact, if, say, PositiveImageList and NegativeImageList both contain a column for PImage, and a row in Lists nests both PositiveImageList & NegativeImageList, I don't know what would happen; in any case that would be confusing.

I note also that Image1, Image, ..., all refer to [Pimage], which means that they will all have the same value. Is that what you intend?

Finally, a bit of general advice that I often give: Build up your experiment bit by bit in small pieces, testing it each step along the way. In fact I often build different pieces in different small experiment programs first in order to get each piece working independently, then I combine these pieces to get the full experiment to work.

BTW, thanks for generally following some good naming conventions for your objects.

-- David McFarlane

________________________________________
From: e-p...@googlegroups.com <e-p...@googlegroups.com> on behalf of Nicole Zabik <zabik...@gmail.com>
Sent: Monday, July 29, 2024 5:45 PM
To: E-Prime
Subject: Nested Image List Errors

Hi all!

Long-time lurker, first time poster. I am attempting to have fun with nested lists, and it isn't that fun.

The Issue: EPrime-3 does not recognize when I call on my nested image lists. Throws me an error saying it "cannot resolve [Image] in the context".

The experiment: participants either choose to see a series of negative or positive images (5 images displayed after a response to a cue).
The nested image lists: I have PRE-randomized 100 positive and negative images to be chosen in that order, so that theoretically each participant sees a variety of images regardless of their response in the last trial(s).

Overall experiment set-up (see also "fullexp.png):
>SessionProc

>>Lists
CueList (list of cues used)
PositiveImageList (pre-randomized positive images)
NegativeImageList (pre-randomized negative images)
BlankImageList (one blank image that trials can cycle through)

>>MainProc
>>>PositiveProc (all procs set up this way)
Instructions
PositiveTrialList (positivetrial.png)
PositiveTrialProc (triallist.png)

Troubleshooting:

* Other experiments run correctly on the computer/in Eprime.
* I have tried using [PImage] and [Image1] to call on column attributes and I get the same error.
* I have tried <[PImage]> and <[Image1]> for feedback displays and it still throws an error.
* I have tried placing ImageLists inside MainProc, and still get an error (attached full experiment as fullexp.png)
* I have c.setattrib for my cues but am wondering if that would work to call on the nested lists. (c.SetAttrib "Negative", "negativecue.bmp")

[Nicole Zabik]

Hi, thanks for the quick reply!

The other item I forgot to mention is that other procs (MixProc, ConflictProc, PunsihedProc) also pull from the Positive/NegativeImageLists.

As a note, PositiveImageList has a column [PImage] while NegativeImageList has [NImage], so theoretically it should know to pull from each.

All of this to say, I think the easiest thing to do is swallow my pride and manually randomize images for each trial. Things will load faster, overall, especially when I transfer this to a more scanner-friendly set up.

However, the plan will be once I have downtime (ha!) is to take your advice and build the task incrementally to see where the error pops up.

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[Nicole Zabik]

Hi --

I have come back with issues of a similar type while using a nested list.

The Issue: Getting internal image error 11041.

Things I have changed since last question:

I switched my set-up to manually randomize images for each trial (positivetrial_update attached).

I also reduced my experiment to ONLY have this proc, vs. having all procs in one (as suggested previously for troubleshooting; positiveproc_update attached to see structure).

Troubleshooting:

> Images display without issue on other experiments in eprime3

> I have all images in .bmp

> I ran the test of <[PosImage1]> text display and it does display the image file name (yay!).

Looking at this group:

I saw old issues where transferring images from Mac > PC can render image issues. Is this still a thing? I modified my images from .jpeg>.bmp on a Mac.

Any pointers for how to resolve?

[Nicole Zabik]

I did more troubleshooting and figured it would be helpful for others to see my solution.

I am using IAPS images that are 1024w x 768h (px). These images (.bmp) readily display on Slide States during training, but DO NOT load properly on Feedback Displays.

I had a feeling it was an image issue so playing around with image size was successful.

Current solution that is working: resizing experiment images to 75% (768w x 576h) and displaying them at 75% of the Feedback Display size.

Future issue to resolve: this task will end up in the scanner environment after completion of this project (approx. 1.5-2 years of data collection). So, I will need to adjust image size and proportion to display correctly on the scanner mirror. Hoping to come back to this post during that troubleshooting and update with other items.

Many thanks to this group! It is great to have a space where we post errors and mistakes. It is such a normal process in research that we often forget about :-)

[Nicole Zabik]

...And to keep this thread alive and interesting, I have found out the REAL reason my images would not load.

It was indeed a Mac > PC error. I resized images on Mac and transferred to PC...but only images I edited on the PC would load on Eprime-3 (v3.0.3.3.1).

So, now that I have mass-edited images using PowerToys on Microsoft, all of my procs run!

Hopefully this helps someone else.

Happy task building!