Randomization of sounds in a memory task

[Leila]

Thanks David McFarlane. Thanks Ben.

I think that you write can help me with my first condition : 2 same
randomized sequence of sounds. I appreciate so much. But, I'm not more
advanced with my second condition: 1 randomized sequence of sounds
fallowed by a sequence similar, but with 2 sounds (randomized
selected) that change of position. Ex: sequence 1:(son1 son2 son3 son4
son5) (2s. of silence) sequence 2 :(son1 son4 son3 son2 son5) (answer
of participant).

I don't know if someone can help me... maybe I should use only a
script for all my experiment.

Leila

On 13 mai, 10:12, "ben robinson" <baltimore.... at gmail.com> wrote:
> so, leila, do you only need to randomize the order of the sounds one time,
> the first time that you present them?if so, just as david pointed out, you
> could make an array, randomize it one time, then assign each element of the
> array to a row in a list.  then you can call the sounds sequentially from
> the list, and repeat the list as many times as you like.
> something like this:
>
> in your UserTab:
> Dim SoundArray(9) as String 'this is a 10-element array of words (don't let
> the 9 in parentheses fool you, since the first element in your array will be
> SoundArray(0).) - you'll just need to fill in the elements by hand...
> Dim i as Integer
>
> in an Inline1, at the very beginning of your script:
> SoundArray(0) = sound1.wav
> SoundArray(1) = sound2.wav
> SoundArray(2)...
> SoundArray(3)...
> ...
> SoundArray(9) = sound10.wav
> RandomizeArray SoundArray
> For i = 1 to List1.Size
>    List1.SetAttrib i, "Sound", SoundArray(i)
> Next i
> List1.Reset
> i = 0
> 'now below Inline1 you'll need to add Label1
> 'and below Label1 add List1 with 10 rows, and add a column in List1 called
> Sound
> 'make List1 call your procedure in which you'll be playing all your sounds.
>  that is, under the Procedure column in List1 fill in every row with the
> name of your trial procedure
>
> 'in your trial procedure, set the object which is meant to play the sound to
> get the name of the sound file from the column titled "Sound" in List1 (to
> do this, instead of typing out the name of a .wav file, just type '[Sound]'
> without the single quotes)
>
> 'on the same level as your Inline1, but below List1, add an Inline2
> 'in Inline2 type:
> i = i + 1
> If i <= 5 Then Goto Label1 'this will repeat your List1 five times before
> ending (that means you should hear the same randomized sequence of 10 sounds
> presented sequentially five times in a row
>
> ben
>
> On Mon, May 12, 2008 at 11:15 PM, David K McFarlane <mcfar... at msu.edu>
> wrote:
>
>
>
>
>
> > Leila,
>
> > > I should presente a sequence of random sounds at participant and 2
> > > secondes after, the same sequence should be presented
>
> > I cannot give specifics,  but in general, E-Prime is not very good about
> > remembering or repeating the past.  So I think repeating the same random
> > sequence will require some advanced script techniques.
>
> > You might try List.GetPrevAttrib() -- look at the List topic in the
> > E-Basic
> > online help.
>
> > Alternatively, you might try creating an array to store the random
> > sequence
> > for playback later.  Or maybe there is a clever way to do this with a
> > nested list and colon syntax.  Or, you could just build the presentation
> > list entirely in script (I did this for one experiment that had special
> > randomization requirements).
>
> > But these are all advanced techniques, so I cannot give details.  Perhaps
> > someone else can show us a simpler way to do this.
>
> >  -- David McFarlane, Professional Faultfinder- Masquer le texte des messages précédents -
>
> - Afficher le texte des messages précédents -
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