Dual Task

[francesco biondi]

Thanks David!

I tried to solve the issue as follows:

- I put a Waitobject (Duration 0, Allowable Correct1, Correct Correct1, 
TimeLimit 2000, EndAction none) before the Slide1 (it contains s1)

- After, Slide1 (Duration SOA, EndAction Terminate)

- After, Slide2 (it contains s2) (Duration 2000, Allowable Correct2, 
Correct Correct2, EndAction Terminate)

By doing so, it does not clear Slide1 after the button press. I can use an 
 Inputobject to do so, by following your advise.

It seems wotking



On Friday, October 18, 2013 12:10:02 PM UTC-6, McFarlane, David wrote:
>
> Francesco, 
>
> To get responses to both s1 and s2, simply add an input mask with 
> appropriate Time Limit to each of them -- please see the "Extended 
> Input" tutorial in Appendix C of the User's Guide that came with 
> E-Prime (and if you have not already, please first work through *all* 
> of the tutorials in *all* the Guides before you start work with 
> E-Prime, it is well worth the effort!). 
>
> You can superimpose visual stimuli with creative use of their Frame 
> and BackStyle properties.  I have done this myself to make all sorts 
> of interesting effects. 
>
> To make s1 & s2 disappear upon response...  Hmm, well, you might use 
> Clear After to clear s2 (even though Clear After is deprecated, see 
> http://www.pstnet.com/support/kb.asp?TopicID=4946 ), but you still 
> need a bit of inline code to clear s1, so you might as well do them 
> both in code.  Something like 
>
>      Do While (s1.InputMasks.IsPending and s2.InputMasks.IsPending) 
>          If s1.InputMasks.IsPending Then s1.Clear 
>          If s2.InputMasks.IsPending Then s2.Clear 
>      Loop 
>      ' expect that s1 & s2 both also get cleared by subsequent program... 
>
> but maybe that gives you enough to start with and you can fix it up 
> as an exercise.  (Advanced exercise:  Make efficient algorithm to 
> handle general case of multiple stimuli with responses.) 
>
> ----- 
> David McFarlane 
> E-Prime training 
> online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx 
> Twitter:  @EPrimeMaster (https://twitter.com/EPrimeMaster ) 
>
> /---- 
> Stock reminder:  1) I do not work for PST.  2) PST's trained staff 
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> \---- 
>
>
> At 10/17/2013 05:58 PM Thursday, francesco biondi wrote: 
> >I am designing an experiment using a dual task paradigm. 
> >I have two stimuli: s1 and s2, and 2 responses: r1 and r2. 
> > 
> >After the fixation point, s1 appers on the right side of the screen 
> >and, after a given soa, s2 appears on the left side of the screen. 
> >I need to record both the responses r1 and r2. 
> > 
> >Since soas are very short (150 and 300ms), subjects won't be able to 
> >produce r1 by the time s2 appears. 
> >Nonetheless, I still need s1 to be visible to let subjects to produce r1. 
> > 
> >My question is: 
> >do you know how i can have (after the soa) both the stimuli on the 
> >screen and record both r1 and r2? 
> >Also, I would like to s1 and s2 to disappear when, respectively, r1 
> >and r2 are produced. 
> >After r2 is produced the next trial starts. 
> > 
> >Thanks 
> > 
> >Francesco 
>
>

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