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Re: Experiment Design

by ronald (Beadle)
on Jul 15, 2002 at 01:17 UTC ( #181672=note: print w/replies, xml ) Need Help??

in reply to Experiment Design

Getting millisecond accuracy is pretty tricky business, and you might be better off with a professional package designed for this kind of thing. I work in a linguistics lab (phonetics), and we use E-Prime from It's designed for use with Windows.

Even if you don't want to use E-Prime, their documentation has some nice discussion of the kinds of technical problems you need to address in a Windows environment for getting millisecond accuracy. Maybe Time::HiRes addresses all these problems already.

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Re: Re: Experiment Design
by frag (Hermit) on Jul 15, 2002 at 06:57 UTC
    I'll second these concerns. Time::HiRes may be up to snuff on Win32 (I don't see why it wouldn't be since it uses XS) but I'd read the source and put it through some torture tests to be sure. And you could always write your own XS code to handle timing if you needed to. But in addition, I'd be concerned about the accuracy of measuring keypress times on a standard keyboard.

    Incidentally, this looks like a good run-down of the commercial experimental psych packages, including E-Prime and others.

    -- Frag.

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