Sampling Trials from SubTrial Procedure

[Tracy Lennertz]

Hi Tim,

Thanks for your reply.

One cycle -- two samples is set on the "GroupList."  I'm not able to  
set this list to have one cycle of 256 samples (E-Prime gives an  
error message, stating the number of samples must be between 0 and 2...)

Thanks again,
Tracy

On Jul 15, 2009, at 8:38 AM, Victor wrote:

>
> 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
> >

-----------------------------------
Tracy Lennertz
Department of Psychology
Northeastern University
125 Nightingale Hall
360 Huntington Avenue
Boston, MA 02115

617.373.4141
lennertz.t at neu.edu


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