Problems with randomizing nested lists by condition

Micah ucfmicah at gmail.com
Fri Sep 10 14:30:24 UTC 2010


I think I may have actually solved my own problem! I have implemented
a much simpler solution that seems to be working. Now I just need to
work on the logs and make sure all the timing looks good! Any standard
tips for what needs to be logged by e-Prime for a standard fMRI
analysis?

Micah wrote:
> Also, this setup seems terrible for logging purposes, as my logs look
> like complete chaos, with only 4 rows and all of the onset times for
> individual stimuli separated by multiple columns. I need a good
> suggestion for a redesign.
>
> On Sep 10, 10:58 am, Micah <ucfmi... at gmail.com> wrote:
> > Hello,
> >
> > I am relatively new to E-prime programming, and have hit a roadblock
> > in developing an fMRI paradigm. The paradigm I am trying to replicate
> > is basically a passive trait-adjective viewing task. You can view the
> > paper I'm getting the paradigm from here:
> >
> > http://scan.oxfordjournals.org/content/2/4/313.long
> >
> > Anyway, here are the essentials of the design:
> >
> > Participants are pre-trained in the distinction between narrative
> > focus (NF) and experiential focus (EF). For the task, participants
> > view a cue (either the word 'judge' or 'sense' with a corresponding
> > picture below it) followed by 6 trait-adjectives. These adjectives are
> > selected from 8 list of words, and it is important that the selection
> > of each list is randomized by condition (judge or sense). The paradigm
> > proceeds in 2 runs, with each condition running twice per run, and the
> > lists should be also randomized between runs. This is where I have had
> > problems- I can get the wordlists to be randomly selected via nested
> > lists for each condition, but checking my logs I can see that some
> > lists are being selected twice. Here is an attempted summary of my set
> > up:
> >
> > SessionProc
> > -Blocklist1
> >  -BlockProc
> >   -DesignList
> >    -? [ListNumber:1]
> >    -? [ListNumber:2]
> >    -? [ListNumber:3]
> >    -? [ListNumber:4]
> >       -TrialProc
> >        -Slide1
> >        -Stimulus
> >        -ISI
> >        -Stimulus
> >        -ISI
> >        -Stimulus
> >        -ISI
> >        -Stimulus
> >        -ISI
> >        -Stimulus
> >        -ISI
> >        -Stimulus
> >
> > My BlockList is just a 4-row list with the vairable ListNumber and
> > WordList1 through WordList4. I am using 8 nested lists for each
> > individual 6-item word list. My design list uses nested lists
> > [ListNumber:1-4], with variables for Condition, PrimeImage, PrimeText,
> > and [Stim:1] through [Stim:6]. [Stim] is a variable in each of the
> > wordlists and is used in each stimulus text display. I then repeat
> > this entire structure for Run2, but with the BlockList listing
> > WordLists 5-8.
> >
> > I hope this is at all clear. It is a relatively simply paradigm with
> > no response task, but I cannot seem to get it to work right.

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