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Clustered randomization of subquestions in array

dandreoli
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1 week 4 days 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 week 4 days 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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