Slider size (case 17391)

[jarvis24]

Yes, there is. MediaLab now support html forms so you can create pretty much anything you want. I've attached a sample (below) of a 100 point slider. It's a java slider embeded within an html page and it shows you the value (from 1 to 100) as you slide it back and forth. It's pretty cool--check it out and see if it's in the ballpark of what you're looking for. Also, if you know any html or java, you can modify it to look and respond however you want. MediaLab simply loads it up, gives it access to question wording, response opitons, colours and such, and then intercepts any posted data. Soon we'll start posting more samples like this--it really opens up the possibilities.

NOTE: The slider item origionally posted here (slider.zip) works for MediaLab 2006.1.*. For users of newer releases (v2006.2.1 or later), slider_revised.zip should be used.

[jarvis24]

[edited from support email]

1. Is there a specific program one should use to edit the continuum.htm file? I do not have much html experience but MS Word seems like it might be inept at this. I would like to be able to add in little images (e.g. smilies) below the slider to reinforce the number value associated with the response.
2. Is there a way to change the values of the slider from (1,100) to something else, like (-10,10)?Again, I apprecite the support on this. As I mentioned I have little to no html experience.

[jarvis24]

Best way to edit html, for me, is with the Windows notepad, or any simple text editor. You can also use Microsoft Frontpage--it is targeted at people who are new to HTML. Generally I would avoid Word unless you are technophobic in which case, it might be the way to go--or find a student who knows HTML--hey there goes one walking down the hall now!

To adjust the range on the slider, just open the conitinuum.htm file in a text editor and change the following text:

s.setMinimum(0);
s.setMaximum(100);
s.setValue(50);

to:

s.setMinimum(-50);
s.setMaximum(50);
s.setValue(0);

And see how that goes!

[Bhagwant]

We are finally getting ready to use the MediaLab software for our study. We are using the slider, which you provided earlier, for creating a pain intensity visual analog scale (VAS). The pain VAS ranges from 0-10. We want the slider to report the integer values (e.g. 1, 2, 3...) as well as fraction values upto the first decimal place (e.g. 1.1, 4.3, 5.6...). I modified the slider to that allows it to report the integer values. However, we don't know how to report the fraction values. Can you please help? I am attaching the modified slider.

[Bhagwant]

I actually found a solution: I made couple of changes to the slider, 1) I set the slider minimum value to 0 and maximum value to 100, 2) then I set the input text color to white so that the subject cannot see the displayed number on the right side of the slider. See the attached slider (pain.htm).

However, now I have 4 more issues:
1) Because I want the slider output to be between 0 and 10, is there a way that MediaLab would divide the output of the slider (between 0 and 100) by 10 to give us the actual value?
2) I want the length of the VAS to be 10 centimeters long. However, it shows up not be 10 cm. Is there anyway that the Javascript can be setup that it automatically figures out the resolution of the screen and sets it to 10 cm?
3) On running a MediaLab experiment with the slider (pain.htm), I receive an error box that states something like "var 003 will not be saved... it is a string." I receive quite a few of these messages right before the final prompt that states that the experiment is over. How can I avoid these messages?
4) Another problem is related to the .csv file generated by MediaLab after running an experiment using the slider. Instead of having actual numbers, the .csv file states "OK." How can that be fixed?

[jarvis24]

Wolud have to see the que and htm files. Be sure to zip them as the board doesn't accept unzipped html files.

[Bhagwant]

I am attaching the zipped files. Thank you. Bhagwant