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Discrete choice experiment

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2 years 4 months ago #242172 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Thank you for your patience! 
I have redone the same exercise "banana/call" to practice with adapting it to my case. but the problem is that the choice bar does not appear? do you have any idea why? I copied the CODE ! proposed here  forums.limesurvey.org/index.php/forum/ca...oice-models?start=24  
 

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2 years 4 months ago #242175 by holch
Replied by holch on topic Discrete choice experiment
did you add a subquestion?

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2 years 4 months ago #242296 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Thanks to your help :)
I finally gave up trying to create my cards on LimeSurvey because the final result was not as beautiful as my original cards. So I created my cards on Canva and imported them directly. 

Now I have a questions about the design of my DCE, I have 18 cards of choice divided into 3 blocks. Each of my respondents has to make 6 choices (cards): 
- How can this be done, i.e. each respondent has access to all 6 cards?
- Is it also possible that the respondents to my survey are randomly distributed over the 3 blocks?

Thank you again for your help and your time. 
 

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2 years 4 months ago #242325 by Joffm
Replied by Joffm on topic Discrete choice experiment
Of course
you are free to create the HTML table. Do whatever you want.
In my last project I used the whole bootstrap stuff.
The "apple - banana" is only a skeleton to show the general way. 


But the design of the experiment is something else.
What exactly means.

I have 18 cards of choice divided into 3 blocks. Each of my respondents has to make 6 choices (cards): 

You have 3 blocks. each one contains 6 cards.
Now what about your respondents? Each one answers one block? I don't think so.
Your respondents answer 6 cards randomly out of the 18?
Your respondents answer 2 cards out of each block?

Please, explain.
Best you show an example.

Joffm

 

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2 years 4 months ago #242326 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Yes, I have 3 blocks with 6 choice cards each.

I am going to import the 18 cards into LimeSurvey, I want to know if I can add conditions so that each of my respondents answers to one block (6 cards).
For example, the first respondent in my DCE responds to the 6 choices in block 1 and the second respondent responds to the 6 choices in block 2 and the third respondent responds to the 6 choices in block 3 and so on.

Overall, I want to have the same number of respondents per block, i.e. if I have for example 100 respondents at the end I want 33 individuals to have answered the choices for block 1, 33 for block 2 and 34 for block 3.

I hope my request is clear to you !
Many thanks.

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2 years 4 months ago #242328 by holch
Replied by holch on topic Discrete choice experiment
You will have to randomize the blocks then. However, chance is never perfect, so you most probably won't get a real even distribution, especially not with such a small sample.

You most probably will have to adjust towards the end of your field time.

If you would know German, there is some pretty good information about all this in one of Joffm's tutorials that you can find in the German forum as PDF files.

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2 years 4 months ago #242348 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Thank you, 
Could you tell me how I can randomise my blocks ?
I can't find the  Joffm's tutorials !
 

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2 years 4 months ago #242349 by Joffm
Replied by Joffm on topic Discrete choice experiment
German section.
Scroll down. About page 4 or 5.
Tutorial 4.

Joffm 

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2 years 4 months ago #242351 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
I still can't find it! Do you have a direct link to access it?

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2 years 4 months ago - 2 years 4 months ago #242360 by holch
Replied by holch on topic Discrete choice experiment
The forum allows you to search and have an advanced search.

If you go to the German forum, put the keyword "tutorial", "search titles only" and as user name "Joffm", it shouldn't be difficult to find Joffm's tutorials...

It gives me results for (in order):
Joffms Tutorial 1: Matrizen
Joffms Tutorial 2: Mehrfachnennung, mehrfache kurze Texte (Stand 01.09.2021)
Joffms Tutorial 4: Gleichungen, Zufall (Stand 4.11.2022)
Joffms Tutorial 3: Gimmicks und andere Spielereien (17.09.2021)
Joffms Tutorial 5: Kurz über Panels

Here the link to my search query:  forums.limesurvey.org/index.php/forum/se...ildforums=1&catids=9

The relevant tutorial should be number 4, Zufall = Chance

Help us to help you!
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Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
Last edit: 2 years 4 months ago by holch.
The following user(s) said Thank You: DenisChenu

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2 years 4 months ago #242437 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Hello to all, 

I thank you for your help, I managed with your help to make my choice cards. 

I have a question about the form: I want to import two videos to explain things further to the respondent. 

I managed to import the first video by following the steps recommended in the other forums, but I did not manage to import the second video by following the same method. I can't even import it into the server. 

I add that the first video (imported) is 18 MB in size, and the second video (not imported) is 180 MB in size, my question is : there a maximum size for the videos to be imported or have I missed something? 

Best regards 
 

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2 years 4 months ago #242442 by holch
Replied by holch on topic Discrete choice experiment
Unfortunately you did not tell us where your LS installation is hosted at the beginning of the thread and I won't go through all 3 pages to check if you mention it, together with your version in some other post.

Generally, there is a size limit in PHP. If you are self hosting, you will have to increase this limit.

If you can't change it, just host the big video file somewhere else and embed it from there.

Help us to help you!
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  • Always provide a LSS file (not LSQ or LSG).
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2 years 4 months ago #242445 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
Sorry for the lack of information!

I use version 3.24.3+201027

It is an online version available within my work. I don't think they host within a common server. I think it's an individual hosting.

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2 years 4 months ago #242447 by holch
Replied by holch on topic Discrete choice experiment
Then you need to get in touch with the person responsible for the server and ask them to increase the size limit for uploads in PHP.

And while you are at it, you should also mention that the version you are running is out-dated and hasn't received any update, bug fix or security patch since 27/10/2020, so basically for 2,5 years this installation is unpatched.

Help us to help you!
  • Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
  • Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.

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2 years 4 months ago #242498 by fkerouaz
Replied by fkerouaz on topic Discrete choice experiment
  Hello,

As I can't increase the size limit for uploads in PHP, I have uploaded the video from youtube by inserting the link of the video. But the video broadcast on Limesurvey is very small, do you have any idea how to increase the size of the video on Limesurvey without sending the respondents directly to youtube?

Thank you !

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