ACME Likert Scale Plugin Demo

Demonstrates custom <likertChoice> element handling with priority-based extraction

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Types: None

QTI XML Source

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<?xml version="1.0" encoding="UTF-8"?>
<assessmentItem xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2"
                identifier="likert-5pt-agreement"
                title="5-Point Agreement Scale">
  <responseDeclaration identifier="RESPONSE" cardinality="single" baseType="identifier">
    <correctResponse>
      <value>agree</value>
    </correctResponse>
  </responseDeclaration>

  <itemBody>
    <h2>Learning Confidence Assessment</h2>
    <p>Please indicate your level of agreement with the following statement:</p>
    <blockquote style="font-style: italic; margin: 1rem 0; padding: 1rem; background: #f5f5f5; border-left: 4px solid #0066cc;">
      "I feel confident in my understanding of QTI 2.2 assessment items."
    </blockquote>

    <choiceInteraction responseIdentifier="RESPONSE" maxChoices="1">
      <prompt>Rate your agreement:</prompt>
      <likertChoice identifier="strongly_disagree">Strongly Disagree</likertChoice>
      <likertChoice identifier="disagree">Disagree</likertChoice>
      <likertChoice identifier="neutral">Neutral</likertChoice>
      <likertChoice identifier="agree">Agree</likertChoice>
      <likertChoice identifier="strongly_agree">Strongly Agree</likertChoice>
    </choiceInteraction>
  </itemBody>
</assessmentItem>

✓ Plugin Registered

The ACME Likert Scale Plugin has been successfully registered with priority 500.

When the Player parses QTI XML containing <likertChoice> elements, the Likert extractor will take precedence over the standard choice extractor.

Likert Choice Elements

✓ This item contains <likertChoice> elements

The Likert extractor will:

Detect the scale type (agreement, frequency, satisfaction, etc.)
Extract choice metadata (scale points, likert index)
Prevent shuffling (Likert scales must maintain order)
Generate default labels for empty choices

How It Works

1. Custom Element Detection: The extractor's canHandle() method checks for <likertChoice> children

2. Priority-Based Dispatch: Vendor-specific extractor (priority 500) takes precedence over standard extractor (priority 10)

3. Type Detection: Automatically detects 6 scale types (agreement, frequency, satisfaction, quality, importance, likelihood) based on text patterns

4. Default Labels: Generates appropriate labels for 3, 4, 5, and 7-point scales when <likertChoice> elements are empty

5. Validation: Ensures 2-7 scale points, no shuffling, and single selection (maxChoices=1)