For general instructions, navigating, and actions related to Analysis Templates see Analysis Templates.

The following are details specific to Analysis Type: Item Response Theory - TBLT. 





When you are creating, editing, or duplicating an analysis template for Item Response Theory - TBLT, the following sub-menus and options are available:  

Source of Parameters

• New Form
  • If Calibration is being produced within the same template:
    • The option defaults to 'Calibration within Template' 
    • 'Calibration from previous request' is disabled
  • If Calibration is coming from a previous request, and not being produced within the template:
    • The option defaults to 'Calibration from previous request'
    • 'Calibration within Template' is disabled
    • The user will be prompted to assign a Request ID in Request Details after a request is generated. See Request Details - Analysis Options - IRT - TBLT for more information.
• Common Items
  • If 'Database' is selected:
    • A dropdown requires selection between Newest or Oldest available parameters in the database.
    • LIC selection is required in Test Settings
  • If 'Parameters from previous request' is selected:
    • No LIC selection is required in Test Settings
    • The user will be prompted to assign a Request ID in Request Details after a request is generated. See Request Details - Analysis Options - IRT - TBLT for more information.

• Ability Distribution and Range Limits to use for Parameters and Comparisons
  • single select option to configure if  using Distribution from Calibration or Normal Distribution.
    • If 'Distribution from Calibration' is selected, no further options display
    • If 'Normal Distribution' is selected, the following options display:
      • Mean
        • manual entry text box  (value must be numeric)
      • Std Dev
        • manual entry text box  (value must be numeric)
      • Lower Limit
        • manual entry text box  (value must be numeric)
      • Upper Limit
        • manual entry text box  (value must be numeric)
      • Increment
        • manual entry text box  (value must be numeric)
• Parameter Specifications
  • Initial Transformation Slope Value
    • manual entry text box  (value must be numeric)
  • Initial Transformation Intercept Value
    • manual entry text box  (value must be numeric)
  • Minimization Tolerance
    • manual entry text box  (value must be numeric)
• Transformation Results
  • single select option to configure if Transform Origin and Unit of Scale (2 or 3 Parameter Logistic Model or Partial Credit Model) or Transform Origin only (1 Parameter Logistic Model).

• a parameter
  • Lower limit
    • manual entry text box  (value must be numeric)
  • Upper limit
    • manual entry text box (value must be numeric)
  • Increment
    • manual entry text box (value must be numeric)
• b parameter
  • Lower limit
    • manual entry text box  (value must be numeric)
  • Upper limit
    • manual entry text box  (value must be numeric)
  • Increment
    • manual entry text box  (value must be numeric)
• Ability
  • Lower limit
    • manual entry text box  (value must be numeric)
  • Upper limit
    • manual entry text box  (value must be numeric)
  • Increment
    • manual entry text box  (value must be numeric)
• Additional Parameter and Ability Distributions (Note: Ability Distributions are only applicable by Form)
  • If toggle is set to 'No', no further options are displayed.
  • If toggle is set to 'Yes':
    • Produce Distributions by
      • multi-select option to produce distributions by Form, AU, and/or LIC (ability distributions only applicable by Form)
      • Note : If Source of Parameters - New Form is 'Calibration from previous request' LIC is disabled.

• Produce ICC Plots for Common Items
  • toggle No/Yes
• Produce ICC Plots for All Items 
  • If toggle is set to 'No', no further options are displayed.
  • If toggle is set to 'Yes', the following options display:
    • Dichotomous Items - 95% Confidence Bands 
      • toggle No/Yes
    • Polytomous Items - Plot Overall ICC Curve
      • toggle No/Yes
    • Size of Population Marker
      • 'Proportional to Total Population at each Ability Group' or 'Constant'
• Produce Test Characteristic Curve
  • If toggle is set to 'No', no further options are displayed.
  • If toggle is set to 'Yes', the following option displays:
    • Scoring for Polytomous Items
      • 'Polytomous Items not included' or 'Score = Category Score'

• Flag Items
  • If toggle is set to 'No', no further options are displayed
  • If toggle is set to 'Yes', the following options display:
    • a parameter
      • if checkbox is unchecked, below options will not display and this flag won't be applied
        • Dichotomous <= 
          • manual entry text box   (value must be numeric)
          • apply flag if result is less than or equal to the entered value
        • Polytomous <= 
          • manual entry text box   (value must be numeric)
          • apply flag if result is less than or equal to the entered value
    • b parameter 
      • if checkbox is unchecked, below options will not display and this flag won't be applied
        • Dichotomous <= 
          • manual entry text box   (value must be numeric)
          • apply flag if result is less than or equal to the entered value
          • OR >=
          • manual entry text box   (value must be numeric)
          • apply flag if result is greater than or equal to the entered value
        • Polytomous <= 
          • manual entry text box   (value must be numeric)
          • apply flag if result is less than or equal to the entered value
          • OR >=
          • manual entry text box   (value must be numeric)
          • apply flag if result is greater than or equal to the entered value
    • Comparison of Parameter Estimates
      • if checkbox is unchecked, below options will not display and the following flags won't be applied
        • a parameter Absolute Difference 
          • if checkbox is unchecked, text box will not display and this flag won't be applied
            • > manual entry text box   (value must be numeric)
            • apply flag if result is greater than the entered value
        • b parameter Absolute Difference 
          • if checkbox is unchecked, text box will not display and this flag won't be applied
            • > manual entry text box   (value must be numeric)
            • apply flag if result is greater than the entered value
        • Reference a 
          • if checkbox is unchecked, text box will not display and this flag won't be applied
            • < manual entry text box   (value must be numeric)
            • apply flag if result is less than the entered value
        • Transformed a 
          • if checkbox is unchecked, text box will not display and this flag won't be applied
            • < manual entry text box   (value must be numeric)
            • apply flag if result is less than the entered value
    • Comparison of ICC
      • if checkbox is unchecked, below options will not display and the following flags won't be applied
        • Unweighted Max Difference >=
          • manual entry text box   (value must be numeric)
          • apply flag if result is greater than or equal to the entered value
        • Weighted Root MSE >= 
          • manual entry text box   (value must be numeric)
          • apply flag if result is greater than or equal to the entered value