scoring a nonresponse as a correct answer

[Jim]

FYI, I set the response duration as 1150ms (100ms prior to the
presentation of the subsequent stimulus) and nonresponses are still
being incorrectly scored as ACC=0. ???

On Feb 23, 5:06 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Jim,
>
> >I don't want to mess with pre-release because the
> >scanner paradigm has already been used/validated by someone in my lab
> >with 100ms prerelease on every object.
>
> That 100 ms PreRelease is almost certainly an artifact of E-Prime
> defaults, and not a deliberate choice on the part of your
> developer.  When you switch an object from Event to Cumulative timing
> mode then EP automatically imposes a default PreRelease of 100 ms,
> and unless the developer edits that then that is what you get left
> with whether it helps or not.
>
> As an exercise, you definitely should try setting PreRelease to 0 and
> then test the timing/sychnonization for yourself.  <rant>Even without
> changes, you must personally shake down every program you use, I
> don't want to repeat the horror story we had here a few years
> back.  If it takes you half an hour to sit through a timing
> verification run, then so be it, although with some cleverness you
> can speed things up using Clock.Scale.  But in any case, you must,
> MUST personally shake down every program you use.  I cannot stress
> that enough.  And as long as you are shaking down that program, you
> might as well try some changes and learn a few things.  Above all, do
> NOT get into a rush -- as my own graduate advisor told me many years
> ago, scientific research is a deliberative process and not a business
> to be done in a rush.  Or have the times changed that much?</rant>
>
> -- David McFarlane, Professional Faultfinder

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