Fragmented pictures with multiple inputs

[Alexandre Nobre]

Hi, David, that worked well. Thanks for the help!

On Monday, August 26, 2013 5:22:38 PM UTC-3, McFarlane, David wrote:
>
> First, another general point about online disussions -- when you post 
> a reply, *please* also include the previous messages from *both* 
> parties, so that your correspondent can readily recall the proper 
> context (look at my reply as an example).  Just a little courtesy to 
> spare your correspondent and other readers some work. 
>
> So, the "criterion based exit" example shows you how to create a 
> simple loop, now you just need to modify the stimulus each time 
> through the loop.  You could do that just by using an attribute 
> reference in your stimulus (e.g., "[FragFile].bmp", and then using 
> c.SetAttrib to set the attribute each time through the loop (see the 
> Context.SetAttrib in the E-Basic Help facility) according to whatever 
> algorithm you devise.  You should be able to take it from there. 
>
> ----- 
> David McFarlane 
> E-Prime training 
> online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx 
> Twitter:  @EPrimeMaster (https://twitter.com/EPrimeMaster) 
>
> /---- 
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>
>
> At 8/16/2013 07:25 PM Friday, Alexandre Nobre wrote: 
> >Hi, David, thank you for the reply. I'm sorry for not being clear 
> >about what I meant. I do have the fragmented pictures, actually. My 
> >main problem is how to repeat the response slide in a single trial 
> >until the participant identifies the picture correctly (which he 
> >does verbally - the key press for repeating the same picture, but in 
> >a less fragmented form, or for jumping to the next picture (trial) 
> >is done by the experimenter). I need to have the slide change the 
> >image it uses every time the participant emits a wrong response, 
> >until they get it right or the last fragmented form has been displayed. 
> > 
> >I've been able to insert several slides and masks in the trial 
> >procedure, so that, if the participant emits a wrong response, the 
> >trial continues on to the next slide, which presents the same 
> >picture in a less fragmented form. If they identify the picture 
> >correctly, then he trial ends using a label. The problem with this 
> >is that, because this task is done simultaneously with a dichotic 
> >listening task, the number of attributes specified in the trial list 
> >is becoming enormous (one sound for each slide, as well as one 
> >image). I imagine that this can be done with a Inline in a less 
> >sloppy way, but I'm not sure how to do this. I checked out the 
> >"criterion based exit" sample you recommended, but, from what I've 
> >understood, in the sample the trials are simply repeated, but not 
> >modified as the experiment goes on, so I've been unable to transfer 
> >it to my experiment. 
> > 
> >On Wednesday, August 14, 2013 12:32:38 AM UTC-3, Alexandre Nobre wrote: 
> >Hello. I'm new to E-prime and am currently trying to implement an 
> >experiment on identification of fragmented pictures, but can't 
> >figure out how. Each trial in the experiment should initiate with 
> >the presentation of a fragmented picture, to which the subject must 
> >respond verbally. If the subject identifies it correctly, the 
> >experimenter initiates the next trial, with a different fragmented 
> >picture. However, if the object is named incorrectly, the same 
> >picture appears on the screen, but in a less fragmented form. Also, 
> >I need to have six different levels of fragmentation, so that, if 
> >the subject can`t identify the picture correctly on any level, the 
> >next trial is initiated, with a new fragmented picture. Does anyone 
> >know how to do this? 
>
>

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