Sampling Trials from SubTrial Procedure

Victor t1msky at yahoo.co.uk
Wed Jul 15 12:38:56 UTC 2009


Hi Tracy,

If I have understood you correctly, you have set the blocklist to 1
cycle of 2 samples so it will only play 2 samples taking one from each
list. If you set the blocklist to 1 cycle of 256 samples would that
not run through all of the trials?

Tim

On Jul 15, 12:55 pm, Tracy <lennert... at gmail.com> wrote:
> Hello,
>
> I'm trying to set-up an experiment with 4 Group Procedures.
>
> First, all participants get the same Practice Block and Practice Block
> List.
>
> Then,  participant will be assigned to one of four Group Procedures,
> specified on a "BlockList" as follows
> Group1Pro       (e.g., participant 1, 5...)
> Group2Pro       (e.g., participant 2..)
> Group3Pro       (e.g., participant 3...)
> Group4Pro    (e.g., participant 4..)
>
> On each Group Procedure (e.g., "Group1Pro"), I have placed a list
> (e.g., Group1List).  This list calls for the Procedure "BlockProc" has
> an attribute [ListName].  This attribute should call what List is
> displayed to the participants -- Each participant wills see two
> lists.  Sampling is sequential, meaning participants should get the
> first list followed by the second; 1 cycle is set to equal two
> samples.
>
> Then, on the "BlockProc" there is a "TrialList."  There is a nested
> variable in this list that references the [ListName] from the
> "BlockProc". My Lists are underefenced E-Objects, which should be
> called into the trial list, depending on what Lists are references in
> the "BlockProc."  This same set-up (with different lists) occurs for
> the other 3 Groups.
>
> For some reason, my experiment will only run 2 two trials (I think
> this is related to the "BlockProc") rather than running through the
> whole list (128 trials).  Both the "TrialList" and my unreferenced
> Lists have 128 trials.  It is sampling one trial from each list,
> rather than 128 from list1 and then 128 from list 2.
>
> How can I get each the experiment to run through each list
> completely?  (e.g., List 1 -- 128 trials then List 2 --128), rather
> than exiting after 2 trials?
>
> Thank you very much for your time -- any help is greatly appreciated.
>
> -- Tracy
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