Terminate the slide only when the subject press a key after a random time

Fri Mar 22 13:15:45 UTC 2013

Thank you, this approach would probably work :)

On Friday, 22 March 2013 13:11:36 UTC, Michiel Sovijärvi-Spapé wrote:
>
> Hi Valerio,
>
>  
>
> So, you want the subject to see the slide for another 1340 ms if they have 
> pressed the button after 1000 ms. So, instead of
>
> If Slide.RT < T then 
>
> Accuracy = 0
>
> Slide.Duration = T – Slide.RT
>
> Goto LabelX
>
> End if
>
>  
>
> Would that work? Now, the duration is adjusted based on the RT. This 
> works, I think, sort of, unless if T = say, 2500. The subject presses the 
> button after 2000 ms (and thus has 500 ms left to see the screen), but now 
> presses the button after 400 ms – oops, now they will see the screen for 
> 2100 ms again. In order to cope, you could add a bit more code above, or 
> reduce T by RT. You could also use an attribute for Slide.Duration to make 
> it something like [T_not_yet_seen], which is first
>
> c.setAttrib “T_not_yet_seen”, c.GetAttrib(“T”)
>
> and in the IF statement above,
>
> c.SetAttrib “T_not_yet_seen”, c.GetAttrib(“T_not_yet_seen”) – Slide.RT
>
>  
>
> Best,
>
> Michiel  
>
>  
>
> *From:* e-p... at googlegroups.com <javascript:> [mailto:
> e-p... at googlegroups.com <javascript:>] *On Behalf Of *Valerio Biscione
> *Sent:* 22. March 2013 14:08
> *To:* e-p... at googlegroups.com <javascript:>
> *Subject:* Re: Terminate the slide only when the subject press a key 
> after a random time
>
>  
>
> Hi Michael and thank you for your reply.
> The problem is that when I go back to the labelX the time that the subject 
> "passes" on the slide1 starts again from 0. But when the subject presses 
> the key (before the reward is available), I would be able to stay on the 
> same slide, so the timer will keep counting the time. 
> I will explain myself better: 
>
> imagine that the random number is 2.34seconds. Now the subject press the 
> key after 1 seconds. I would like to be able to have the subject to 
> continue to see the same slide. So the subject waits another 1.5 seconds 
> (and the total is now 2.5 seconds) before pressing the button. But now, 
> when he/her presses it, the software goes to the next slide.
>
> In you example the subject will always starts from 0. So using the same 
> random number as before, if he/her presses the key after 1 seconds, he has 
> to wait at least 2.34 seconds before pressing the key and getting the 
> reward (whereas in the previous example, after the first pressing, he/her 
> has to wait just a minimum of 1.34 seconds).
>
>  
>
>
> On Friday, 22 March 2013 11:44:22 UTC, Michiel Sovijärvi-Spapé wrote:
>
> Hi,
>
> It’s not really that strange – I find that many people, but cognitive 
> psychologists in particular, seem unaware of just how very small the world 
> of their favourite paradigm can be J In fact, I have not heard of this 
> procedure and I suppose this is because it is more popular with those 
> who’re more interested in the conditioning side of things, but I could be 
> wrong there. 
>
> In any case, what’s wrong with 
>
> 1.       Inline: Accuracy = -1
>
> 2.       LabelX
>
> 3.       Slide, set .Duration to -1. 
>
> 4.       If Slide.RT < T then 
>
> Accuracy = 0
>
> Goto LabelX
>
> Etc?
>
> Sorry, it’s Friday, difficult to think very straight, but to be honest, I 
> cannot see what’s wrong with just going back to the moment just before the 
> slide is presented. 
>
> Best,
>
> Michiel
>
>  
>
> *From:* e-p... at googlegroups.com [mailto:e-p... at googlegroups.com] *On 
> Behalf Of *Valerio Biscione
> *Sent:* 22. March 2013 13:21
> *To:* e-p... at googlegroups.com
> *Subject:* Terminate the slide only when the subject press a key after a 
> random time
>
>  
>
> I have searched on the group for other topics with this problem, but I 
> haven't found anything. 
> This is actually a normal Variable Interval schedule, so it's strange that 
> hasn't been treated already.
>
> I want to show a slide to the subject. At the beginning of the slide a 
> random number is generated. This random number indicates the number of 
> milliseconds that the subjects has to wait to receive a reward. Let's call 
> this random number T. The subject can press the key anytime he/she wants, 
> but only if he presses the time AFTER the time T he will receive a reward 
> and the software can go to the next slide. If he presses the key before T 
> he receive a punishment, but can still try to "win" the reward in the slide.
>
> I already solved the problem to record all the RTtime that the subject 
> press the key during the slide. The problem is to make the software to go 
> further ONLY if the key is pressed after T. T is recorded in a variable, 
> but won't be a problem to use an attribute.
> Do you have any idea?
> Kind Regards
> Valerio 
>
> -- 
> You received this message because you are subscribed to the Google Groups 
> "E-Prime" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to e-prime+u... at googlegroups.com.
> To post to this group, send email to e-p... at googlegroups.com.
> To view this discussion on the web visit 
> https://groups.google.com/d/msg/e-prime/-/xIBEh-dbA3oJ.
> For more options, visit https://groups.google.com/groups/opt_out.
>  
>  
>
> -- 
> You received this message because you are subscribed to the Google Groups 
> "E-Prime" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to e-prime+u... at googlegroups.com <javascript:>.
> To post to this group, send email to e-p... at googlegroups.com <javascript:>
> .
> To view this discussion on the web visit 
> https://groups.google.com/d/msg/e-prime/-/Fof8yQk69rkJ.
> For more options, visit https://groups.google.com/groups/opt_out.
>  
>  
>

-- 
You received this message because you are subscribed to the Google Groups "E-Prime" group.
To unsubscribe from this group and stop receiving emails from it, send an email to e-prime+unsubscribe at googlegroups.com.
To post to this group, send email to e-prime at googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msg/e-prime/-/GDBP9H-L_LgJ.
For more options, visit https://groups.google.com/groups/opt_out.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.linguistlist.org/pipermail/eprime/attachments/20130322/974db7e7/attachment.htm>