coding a dual task with musical stimuli

[pauline narme]

Hi, 

I would like some tips to code a dual task. My experiment is a memory task 
with an encoding condition in divided attention. 
More precisely, subjects have to listen to musical excerpts (mean duration 
around 10 sec) while they have to respond to a series of trials involving 
responding to digits.
I followed the dual task sample available on the PST website and did 
exactly the same (i.e. "The start time is determined at the beginning of 
the trial. The object presenting the word has a Duration value of zero 
msec. This displays the word, then immediately begins presentation of the 
digit task. The duration of the word is set as an attribute in the 
WordList, but the actual run-time duration is monitored by the digit 
trial"s)

However, although the task is running without error, I can hear any sound. 
This is probably due to the duration value of zero msec of the sound 
"object", but if I change this value, this is not a dual task anymore since 
the sound is first heard THEN digits appeared.

Looking forward to read some help.

Thanks, 

Pauline 

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