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Clustered randomization of subquestions in array

  • dandreoli
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1 month 2 weeks ago #265262 by dandreoli
Clustered randomization of subquestions in array was created by dandreoli
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Hi all, 

I am working on a survey for my PhD project. In this survey, I would like to have an array based question where respondents have to indicate on a 5pt Likert scale to what extent they agree with the presented statement. To limit response bias, I would like these statements to be presented in a random order. In the set of statements I would like to include however, some subtopic or clusters can be identified. Because it does not make sense for the respondent to first think of a statement related to topic A, then one on B followed by one on A again, I would like to see the randomization based on clusters. Such that both the order of the clusters, as well as the sub-questions within a cluster are random (see the small diagram below for a representation). Does anyone know how I can go about this? I already tried to create multiple arrays, but that way the general question also gets presented on a random location because it is attached to a single array. Any help is appreciated. 

Kind regards, 
Dennis Andreoli
Example: 3 clusters: with 3 statements each:Cluster A
  •                Statement A1
  •                Statement A2
  •                Statement A3
Cluster B
  •                Statement B1
  •                Statement B2
  •                Statement B3
Cluster C
  •                Statement C1
  •                Statement C2
  •                Statement C3
 Randomization as follows:FORMULATION OF QUESTION / EXPLAINATION OF TASKCluster B
  •                Statement B3
  •                Statement B2
  •                Statement B1
Cluster A
  •                Statement A2
  •                Statement A1
  •                Statement A3
Cluster C
  •                Statement C3
  •                Statement C1
  •                Statement C2

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  • Joffm
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1 month 2 weeks ago #265268 by Joffm
Replied by Joffm on topic Clustered randomization of subquestions in array
Hi,
insert this script into the question text (source code mode) (adapted from an idea of Tony Partner)
Code:
<script type="text/javascript" data-author="Tony Partner">
  $(document).on('ready pjax:scriptcomplete',function(){
 
function shuffleArray(array) {
    for (var i = array.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var temp = array[i];
        array[i] = array[j];
        array[j] = temp;
    }
    return array;
}
    
    
    //Identify this question
    var thisQuestion = $('#question{QID}');
    var thisAnswerList = $('tr.answers-list:eq(0)', thisQuestion).parent();
 
    
    // Fill the arrays with the subquestion codes
    var arrayA=[1,2,3];
    var arrayB=[4,5,6];
    var arrayC=[7,8,9];
 
    
    shuffleArray(arrayA);
    shuffleArray(arrayB);
    shuffleArray(arrayC);
    var arrayZ=[arrayA,arrayB,arrayC];
    shuffleArray(arrayZ);
    
    var answerCodes = arrayZ.join(",").split(',');
    
    // Loop through the answer codes
    $.each(answerCodes, function(i, val) {
      // Move the answer item
      $(thisAnswerList).append($('tr.answers-list[id$="X{QID}'+val+'"]', thisQuestion));
    });
  });
</script>

 

Joffm
 
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  • dandreoli
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1 month 1 day ago #265489 by dandreoli
Replied by dandreoli on topic Clustered randomization of subquestions in array
Hi Joffm,

Thanks a lot, it is working. Do you know of a way to 'fix' the background color alternation of the answer options by any chance?

Dennis

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  • tpartner
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1 month 1 day ago #265494 by tpartner
Replied by tpartner on topic Clustered randomization of subquestions in array
See here - forums.limesurvey.org/forum/search?query...artner&childforums=1

(Scroll down to "Fix up the row background colours")
Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.

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