Res: experiment design

[Thenille Braun]

Hi Matt,
thank you very much for your attention.
I'll work on it.
I've started to work with e prime 2 months ago, and I have a few problems to solve yet.
The experiment I described in my last email would have two different stimuli - in 1 group the participants will have to tap their fingger with auditory stim. , and this experiment I was able to develop - I created the wave fills in Sound Forge. But the 2 group must to do the same thing with visual stim. (flashing) and this I am not able to design.
I'm sending my filles to you. It would be great if you take a look and help me with this.
And I'm working with e prime 1.0
Could you help me to write the InLine scripts? This will be wonderfull ...
Thank you soo much!
All the best!
Thenille. 


----- Mensagem original ----
De: Matt Lenhart <mplenhart at gmail.com>
Para: E-Prime <e-prime at googlegroups.com>
Enviadas: Terça-feira, 26 de Agosto de 2008 12:23:02
Assunto: Re: experiment design


Hi Thenille,

The most common options for presenting flashing stimuli in E-Prime
are:

1) If you are using E-Prime 2.0, create and present a movie file with
the desired effect.

2) Use InLine script and the Canvas object to quickly present and
remove images and/or text, creating a "flashing" effect. If you are
unfamiliar with the use of the Canvas object, I would recommend taking
a look at the Canvas topic in the E-Basic help (accessed via the Help
menu in E-Studio). The basic functions of the Canvas object are
presenting text, images, and shapes on the screen. The text, images,
and shapes can be removed by "clearing" the Canvas (i.e., screen).

3) Use InLine script and a Slide object to present a "flashing"
effect. Slide sub-objects can be accessed in InLine script and their
properties can be changed in real time. This requires a very specific
technique so that the Slide object can be presented on screen while
InLine script is running. In the FIles section, take a look at the
Process Responses Template sample for an example of how this is done.
Essentially, the Slide object's Duration is set to 0, while the End
Action is set to "none" and the Time Limit is set to however long you
want to allow the subject to respond. Because of this, the object will
be presented on screen and E-Prime will then immediately begin running
InLine script.

You should be able to adapt the sample directly to your purposes. The
primary change would be that your experiment will alter the color of
the Slide object at regular intervals, rather than waiting for a
response from the subject.

If you have any questions, please let me know.


Matt
PST Technical Consultant
http://www.pstnet.com


On Aug 25, 9:40 am, thenillebraun <thenillebr... at yahoo.com.br> wrote:
> Hello.
>
> I've been trying to desing an experiment in e-prime which participants
> would have to tap the fingger at the same time that visual stimuli
> flash in the center of the computer. This stimulus its like a point
> flashing in 800 msec, in a second trial the time is 400 msec, then 200
> msec and so on.
>
> How can I desing this experiment with flashing stimuli?
> Any help would be highly appreciates.
>
> All the best
> Thenille Braun.


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