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

[Valerio Biscione]

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 <javascript:> [mailto:
> e-p... at googlegroups.com <javascript:>] *On Behalf Of *Valerio Biscione
> *Sent:* 22. March 2013 13:21
> *To:* e-p... at googlegroups.com <javascript:>
> *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 
>
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