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<P>hi, everyone</P>
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<P>first I will describe the theoritical idea:<BR>my Exp that I wanted to set it call ( dual task experiment) there is many design of it , But I using the design of "psychological refractory period effects" which contain two tasks in one trials with "stimulus onset asynchrony=SOA" between them (every task contain independent stimulus & response) .Results show that reaction time of stiumuls2 will be longer as a function of SOA duration. Most researches used very short & long Soa (the range was between 0 ms:1000ms or more) between the onset of the stimulus1 & onset of stimulus2 in the same trial .So it is very important variables. when the The SOA duration is longer or equal to the stimulus one duration there is not any problem & I can use "wait object" ; but the problem if Soa duration are less than stimulus1 duration -which I can not handle it with E-prime . In this last kind it seems that the two stimulus (S1 & s2) appear concurrently; but in fact there i
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<P>>Zainab, </P>
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<DIV></DIV>>Please provide more detail about what exactly you are trying to do and I
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<DIV></DIV>>think someone on the list will be able to give you some advice. You
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<DIV></DIV>>need to describe the trial sequence in detail and ideally provide an
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<DIV></DIV>>example time line of exactly what you want to happen when. For
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<DIV></DIV>>example...
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<DIV></DIV>>What is the exact nature of your stimuli (words, pictures, auditory
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<DIV></DIV>>files)?
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<DIV></DIV>>If auditory is involved how long are the stimuli?
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<DIV></DIV>>How many stimulus presentations are in your trial sequence.
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<DIV></DIV>>How long is a single trial?
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<DIV></DIV>>Can the trial length vary?
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<DIV></DIV>>How long is your response period?
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<DIV></DIV>>Which stimulus in the trial sequence enables the response?
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<DIV></DIV>>What do you want to happen when a response is taken?
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<DIV></DIV>>What happens when the subject makes no response?
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<DIV></DIV>>When you talk about "< stimulus1 duration" do you mean < 1 screen
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<DIV></DIV>>refresh? If not, what constitutes a stimulus duration?
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<DIV></DIV>>etc...
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<DIV></DIV>>Maybe the best way to do this is to write/provide the Abstract and
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<DIV></DIV>>Methods section of your research paper. If you can be more clear on
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<DIV></DIV>>exactly what you want you will be more likely to get someone to
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<DIV></DIV>>respond..
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<DIV></DIV>>Regards,
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<DIV></DIV>>Tony
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<DIV></DIV>>*** DISCLAIMER: VIEWS EXPRESSED ARE MY OWN AND DO NOT NECESSARILY
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<DIV></DIV>>REFLECT THOSE OF MY EMPLOYER ***
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<DIV></DIV>>Anthony P. Zuccolotto
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<DIV></DIV>>Vice President of Operations
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<DIV></DIV>>Psychology Software Tools, Inc.
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<DIV></DIV>>-----Original Message-----
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<DIV></DIV>>From: zainab h.hussein [mailto:hhzainab@hotmail.com]
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<DIV></DIV>>Sent: Monday, May 13, 2002 7:26 PM
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<DIV></DIV>>To: eprime@mail.talkbank.org
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<DIV></DIV>>Subject: dual task
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<DIV></DIV>>Hi, everyone
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<DIV></DIV>>Could any one used E- prime before helping me in setting up dual task
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<DIV></DIV>>experiment with using psychological refractory period paradigm " which
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<DIV></DIV>>contain two task with stimulus onset asynchrony SOA (especially when SOA
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<DIV></DIV>>duration is less than stimulus1 duration )
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<DIV></DIV>>Thanks a lot.
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<DIV></DIV>>Zainab H. Hussain
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<DIV></DIV>> _____
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