Changing sub-object duration property

[David McFarlane]

Fiona,

Just extending what Mich proposed...

- StimSlide (with stimulus plus Yes & No), Duration = 0
- HitTestCode inline to handle mouse clicks 
during the StimSlide, skip to HitDoneLabel upon a 
valid response, and to timeout at 2000 ms
- YesNoSlide (with just Yes & No), Duration = 0
- HitTestCode2 (possibly the same as HitTestCode 
earlier) to handle mouse clicks during the YesNoSlide
- HitDoneLabel

Note that, if you want to handle multiple mouse 
clicks (e.g., subject might click on Yes, No, or 
a null region), then you must set Slide durations 
to 0 in order to get to the inline code which 
handles the mouse clicks, timing, & 
termination.  (Advanced users may instead set 
StimSlide Duration = 2000 and PreRelase >= 2000, 
which offers some coding advantages.)  PST might 
have an example program to show some of this that 
you may download from their web site.

Note that both inline code segments may apply 
.HitTest to the same Slide (e.g., both use 
StimSlide,  or both use YesNoSlide), it does not 
matter which Slide appears on the display at the 
moment.  .HitTest does not care at all about what 
actually appears on the screen (and for that 
matter, does not even require an actual mouse 
click); it merely takes the given SlideState and 
x-y coordinate and finds the name of the Slide 
region or sub-object to be found at that 
location.  IOW, .HitTest is little more than a 
slightly disguised & elaborated PointInRect().

-- David McFarlane, Professional Faultfinder


At 7/29/2010 07:47 AM Thursday, Michiel Spapé wrote:
>Hi,
>To my knowledge, duration is a property of a 
>slide and its sub-objects (slide states being 
>sub-objects themselves, in a way) cannot have 
>independent duration, like all other properties 
>shown on the duration tab. I grant you, it would 
>be incredibly useful, if this were possible!
>Apart from that, what you are asking can easily 
>be implemented by using a copy of the same slide 
>right after the other one, which is almost 
>exactly the same thing I suggested in my previous post here.
>So, you have
>Slide1, duration until mouse, yes and no images, maxcount = 1
>Slide2, duration of 2000 - Slide1.Duration (put 
>an inline in between the slides), no images, maxcount = 100 (or something).
>
>Would that work?
>Best,
>Mich
>
>Michiel Spapé
>Research Fellow
>Perception & Action group
>University of Nottingham
>School of Psychology
>
>
>-----Original Message-----
>From: e-prime at googlegroups.com 
>[mailto:e-prime at googlegroups.com] On Behalf Of Fiona
>Sent: 29 July 2010 05:43
>To: E-Prime
>Subject: Changing sub-object duration property
>
>Hi,
>
>I'm not sure if I'm missing something...
>
>I've created a slide object which contains a "Stimulus" image, a "Yes
>Response" image and a "No Response" image. I'm using mouse input to
>register the response and using HitTest to record and score the
>location of the mouse response as either "Yes" or "No".
>
>I would like to set the Stimulus image duration to 2000msec, allow any
>mouse clicks to be recorded during that duration, and if no response
>is recorded, leave the "Yes Response" and "No Response" images on the
>screen until a response is recorded.
>
>I have tried to change the duration of each sub-object separately, but
>each time I change the duration it applies to the entire slide. I have
>also tried using different slide states and multiple slides, but when
>I do this the HitTest no longer records a single response (i.e.
>participants need to respond twice).
>
>Is it possible to change the individual properties of sub-objects on a
>single slide?
>
>Any help would be great!
>
>Cheers

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