Does "Random" mean "Random without replacement"?

[jbpsy1]

Thanks.

I did that shortly after I posted my message... Too little too late. I
appreciate your response.

jb

On Jun 27, 7:38 am, David McFarlane <mcfar... at msu.edu> wrote:
> JB,
>
> Yes.  In E-Prime, "Random" means "Random without replacement".  This
> is mentioned, among other places, in Tutorial 1 of the Getting
> Started Guide, and the RandomOrder Object topic of the E-Basic online
> help.  By contrast, "Random with Replacement", does, well, random
> with replacement.
>
> But you should test this for yourself.  Make a simple test program
> with a single list of, say, 3 or 10 levels.  Set it to Sequential and
> make sure that it plays everything in order.  Set it to Random and
> see that it always does each level exactly once before
> repeating.  Set it to Random with Replacement and see that levels may
> repeat any time.
>
> -- David McFarlane, Professional Faultfinder
>
> At 6/26/2008 05:39 PM Thursday, you wrote:
>
> >I'm setting up an experiment that displays varying amounts of blocks
> >at random locations on the computer screen, as well at varying
> >presentation durations. I should say that there must be an easier way
> >to set this project up, but while I'm fairly adept at programming in
> >eprime, I've never been too keen on InLine objects or User Script
> >programing, so basically I know no other way than the fairly drawn-out
> >point and click method (which amounts to many lists and a huge
> >structure).
>
> >Anyhow, the experiment consists of a number of lists all feeding off
> >of one "master" list. Basically, at the "master" list, the program
> >picks one of three procedures to cycle through, then returns to the
> >"master" and cycles through again, randomly. I've weighted each of the
> >three procedures in the "master" list so that they are all completed
> >the same number of times, but my question arises after the program
> >picks a procedure from the "master" list and begins to cycle through
> >it... Once the "master" list randomly chooses one of the three
> >procedures to cycle through, it meets a second list (actually, each of
> >the three aformentioned procedures from the "master" list are set up
> >this way, so you only need to imagine one... the answer will apply to
> >all three). The second list consists of 11 different procedures that,
> >in the end, display a series of blocks a different number of times at
> >different presentation durations. It is important that all 11
> >procedure types from List2 (i.e. displays/presentation durations) are
> >presented an equal number of times. The second list is also set to
> >select randomly, and set so that 1 cycle equals 1 sample. Herein lies
> >my question:
>
> >Currently each procedure in my "master" list is weighted at 11 so that
> >it has the opportunity to display each of the 11 procedures from the
> >second list... By setting my second list to "random", will eprime stop
> >choosing a procedure that it has already chosen in a previous
> >iteration of the program? In other words, after one of the 11
> >procedures is chosen at random from List2, and the program cycles back
> >to the "master" list to cycle through again, can/will the same
> >procedure that has been displayed on a previous iteration be chosen
> >again, or will the program not re-choose an "already chosen" procedure
> >to run? With my project set up in this manner, can I be sure that all
> >11 procedures from list 2 have been displayed, or should I be
> >concerned that some may or may not ever be selected?
>
> >I appreciate your help!
>
> >jb
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