Growing feedback bar

[Leisha Wharfield]

Thanks to all of you for your suggestions!

Leisha

Moss, Antony Charles wrote:

>I'd suggest something similar- if you set the width (or height,
>depending on the orientation of your bar) as an attribute, which is
>set to an appropriate default value (so the width of the bar would be
>something like '[width]:10%'), some simple scripting will then allow
>you to update this as participants earn points.  I suspect that this
>could be achieved simply by inserting a short script at the end of the
>trial procedure which increases the width attribute by a certain
>amount if the previous response was correct.
>
>I did something very similar with a slider bar, but instead of varying
>the width, I was varying the Y-position of a line to allow
>participants to give responses on a semantic differential scale (e.g.
>agree-disagree with a statement), hence allowing them to see the
>response they were giving.
>
>Tony
>
>_______________________ 
>Antony Moss 
>Graduate Teaching Assistant 
>Department of Psychology 
>London South Bank University 
>London 
>SE1 0AA 
>  
>Tel:      020 7815 5869 
>Fax:     020 7815 5775 
>Email:   mossac at lsbu.ac.uk
>
>-----Original Message-----
>From: eprime at mail.talkbank.org [mailto:eprime at mail.talkbank.org] On
>Behalf Of Michael P. Berner
>Sent: 02 August 2007 08:12
>To: 'Leisha Wharfield'; 'E-Prime'
>Subject: AW: Growing feedback bar
>
>Leisha,
>
>one possible solution might be continually resetting the width of the
>SlideImage object (i.e., the bitmap of your bar) via an Attribute
>(e.g.,
>[BarWidth]) that is incremented in an InLine script whenever the
>participant
>scores a point. Crucially, the Stretch option of the SlideImage would
>have
>to be set to Yes. In this way, the bar "grows" with the increments as
>the
>bitmap is stretched to the newly set width of the SlideImage. One
>limitation
>of this approach is that you can increment in steps of 1 percent only,
>and
>I'm not sure whether that would suffice to create the impression of
>smooth
>growth you're looking for (esp. given the maximum score of 28 points,
>which
>limits your successive increments for each point to 3 steps; with
>increments
>of 4 points you will eventually run out of screen space).
>
>best wishes  --  Michael Berner
>
>--------
>Department of Psychology
>University of Wuerzburg, Germany
>http://www.psychologie.uni-wuerzburg.de/i3pages/
>
>
>
>
>-----Ursprüngliche Nachricht-----
>Von: eprime at mail.talkbank.org [mailto:eprime at mail.talkbank.org] Im
>Auftrag
>von Leisha Wharfield
>Gesendet: Mittwoch, 1. August 2007 21:52
>An: 'E-Prime'
>Betreff: Growing feedback bar
>
>Hi, all,
>
>What would be the easiest way to create a bar that grows on the
>screen? 
>Subjects can earn up to 28 points, so a green progress bar will grow 
>every time they earn a point. I have 28 bars of various sizes, but we 
>want the bar to appear to grow, so I also have a piece of the bar that
>
>is one-quarter of one point. I want to add it to the top of the bar in
>
>quick succession so that the bar appears to grow. The problem is 
>determining the exact place on the screen to place the little bar
>piece.
>
>Is there an easier way?
>
>Leisha Wharfield
>Decision Research
>Eugene, Oregon USA
>
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-- 
“And then many things happened at the same moment.”