different presentation times

[David McFarlane]

Jotapan,

>I'm programming a simple experiment in which participants will be
>presented with single words. I want words to be presented randomly in
>two different times (lets say 2sec and 5 sec) but making sure half the
>words are presented with each presentation time... Is there a simple
>way of doing this?

Yes.  In your display object, I would use an attribute for the 
Duration, say, [Duration] (and for future use, please note that you 
can use an attribute reference for almost any object property, very 
handy).  Then in your trial list, I would add a column for Duration. 
I would make two rows for every word.  In one of those rows I would 
put 2000 in the Duration column, and in the other I would put 5000 
for Duration.

>Also, I would like to present a clock on the screen counting down from
>5 min to 0 min (time's up!) (e.g., 5min, 1min...) for an additional
>task at the end of the word presentation.

This is not simple.  I think this has been asked before, perhaps even 
answered, perhaps a search of the archive will help.

-- David McFarlane, Professional Faultfinder


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