Superimposing prime/distractor after a delay

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Great. Thanks for your advice, David.

On Oct 21, 11:58 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Jessie,
>
> >I want to present a target picture (for 57ms) followed by a word
> >superimposed over the picture. (The 'positive SOA' in the picture-word
> >interference paradigm).
>
> >I saw a similar query here:
> >http://groups.google.com/group/e-prime/browse_thread/thread/1a8ceb9a2...
> >but it looks like in that case the displays are sequential rather than
> >superimposed. (I have no problem superimposing stimuli simultaneously,
> >but I cannot find the settings for inserting a delay).
>
> To the contrary, that post exactly answers your question, i.e., the
> stimuli are *both* sequential *and* superimposed, which is exactly
> what you have asked for.  Read it carefully again.  In particular,
> imagine what a TextDisplay BackStyle of Transparent might do.
>
> >My first attempt is like this:
> >I have an Image Display for the target, followed by a Text Display for
> >the 'distractor' word. I set the Image Display Duration to 57ms, the
> >End Action to None, and Clear After to No. With these settings, it
> >still 'clears after' - i.e. when the Text Display appears, the Image
> >Display disappears. I want the text to appear over the top of the
> >picture.
>
> >If the Displays are presented within one slide, then there are no
> >options for Duration, etc. for each of the separate component
> >Displays.
>
> >The only way I can think of is to present the Image Display for 57ms,
> >followed a Slide which presents the two stimuli simultaneously. But
> >this seems very clumsy and the RT will start recording 57ms late.
>
> Actually, this would be a very ordinary way to do this in EP, and
> even though I know how to do overlays, for a simple 1-2 overlay as
> you describe I would probably do it with an image followed by a Slide
> that contains the image plus the text.  Note that even in this case
> you might want to attend to the BackStyle property of the SlideText
> object, plus its other Frame properties.  As for the RT, as also
> mentioned in the original post, simply use Extended Input with the
> initial stimulus, and do not have the Slide that follows the initial
> stimulus collect any response.
>
> >I'm sure there is something very simple I'm missing. If anyone has any
> >suggestions, they'd be very welcome!
>
> >Thanks,
> >Jessie
>
> -- David McFarlane, Professional Faultfinder

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