using old task on new computers

[David McFarlane]

Stock reminder:  1) I do not work for PST.  2) PST's trained staff 
takes any and all questions at 
http://support.pstnet.com/e%2Dprime/support/login.asp , and they 
strive to respond to all requests in 24-48 hours (although latest 
reports indicate more like 10 days) -- this is pretty much their 
substitute for proper documentation, so make full use of it.  3) If 
you do get an answer from PST Web Support, please extend the courtesy 
of posting their reply back here for the sake of others.

That said, here is my take ...

Well, it would be an *extremely* poor software design that made 
timing dependent on processor speed, and I have no reason to suspect 
PST of such poor design.  Furthermore, using various versions of 
E-Prime on various generations of computers and Windows for over a 
decade, I have never seen any timing issues dependent on processor 
speed (other than timing delays needed to produce complex stimuli, 
but that cannot be helped).  As far as I can tell E-Prime properly 
uses a variety of independent high-resolution clocks built into 
Windows machines.

But ultimately you should not take my word or anyone else's word for 
this.  You should simply run some timing tests for yourself 
(preferably using an external time reference such as an oscilloscope) 
and convince yourself one way or another.  That is a good exercise 
and sound policy in any case.

-- David McFarlane, Professional Faultfinder
"You got to test that piece of software, You got to test it for yourself,
No one else can test it for you, You got to test it for yourself."
(Apologies to the Fairfield Four)


At 4/16/2010 12:22 PM Friday, you wrote:
>i am very new to using e-prime and have a task that involves
>presentation of visual stimuli on the screen that was given to me by a
>researcher that used it in 2001. i am wondering if the speed of
>presentation of stimuli is controlled by the code or will it be
>affected by the increased speed of the computers that i will be using
>it on.

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