Filtering out Stroop Task trials based on sequence relation to other trials.

[CallMeTylee]

Hello all,

I'm hoping to get some insight/recommendations regarding complex
filtering of trials during an Emotional Stroop paradigm.

I'm using the E-Prime v1.1 software package. I've used E-Run v1.1.4.6
to present single words in a color response task. There 10 words from
five different semantic categories(a,b,c,d,e), yielding 50 words
total. Each word is presented once in each of 3 colors, yielding 150
trials. Each of these word-color stimuli are presented randomly,
without replacement. You may recognize this as a "mixed presentation"
emotional Stroop task.

For filtering and analysis, I'm using E-DataAid v1.1.4.1. (Outdated,
yes.)
---------------------------------
Problem 1:
I would like to filter out all trials except those occurring directly
after the presentation of "catagory a" words.

Problem 2:
I would like to filter out all trials except those occurring directly
after presentation of "category a" or "category b."
--------------------------------
I have not had any luck achieving these goals myself (using DataAid
v1.1.4.1). I understand this problem could have been avoided by
presenting the words in a fixed, pseuedo-random sequence. Since, I've
already collected 300+ data files (using randomization w/o
replacement), I'm hoping someone may know of a solution. In order to
better direct your feedback, I will propose some possible solutions. I
need you to tell me if such a solution exists!
--------------------------------

Potential Solution 1:
Using the current software (DataAid v1.1.4.1), there is some way to
filter out trials, such that only trials occurring directly after
"catagory a" words remain. If you're familiar with this version and
know of a solution, please respond with "Actual Solution 1."

Potential Solution 2:
Using a newer version of DataAid software, there is some way to filter
out trials, such that only trials occurring directly after "catagory
a" words remain. Since I have no experience with newer versions of
DataAid, I can only hope that there are new filtering options. If
you're aware of a solution using a different version of DataAid,
please respond with "Actual Solution 2." I someone could confirm this,
I would be interested in purchasing an updated version of DataAid.

Potential Solution 3:
There is some 3rd party software that can analyze files created by E-
Prime. (Tsk tsk.) If you're aware of some other software that may be
able to perform this complex filtering, please respond with "Actual
Solution 3."

Of course, I welcome any other ideas you may have!
Thanks,
-Dan
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