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

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





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

Processing Options

• Treatment of Omitted Selected Responses
  • toggle to exclude or include omitted Selected Responses.
• Treatment of Omitted Constructed Responses
  • toggle to exclude or include omitted Constructed Responses.
• Treatment of Not Reached Selected Responses
  • toggle to exclude or include not reached Selected Responses.
• Treatment of Not Reached Constructed Responses
  • toggle to exclude or include not reached Constructed Responses

• Newton-Raphson algorithm
  • toggle No/Yes
  • NOTE: This option is designed to be used when calibrating a relatively small collection of items. The use of this option with a larger item pool may affect running time of the analysis.
• Max Iterations per Stage 
  • manual entry text box  (value must be >= 0)
• Max Iterations for Approximation
  • manual entry text box  (value must be >= 0)
• Two Stages
  • toggle No/Yes
• Convergence Criterion
  • manual entry text box  (value must be >= 0)

• Number of Quadrature Points
  • manual entry text box  (value must be > 0)
• Evenly Spaced Grid
  • If toggle is set to 'No', no further options are displayed
  • If toggle is set to 'Yes':
    • Range of Points for Even Spacing
      • manual entry text box  (value must be > 0)

• Number Observations for Starting Iteration
  • NOTE: option only available if Parameter Specifications option 'Two Stages' is set to Yes.
  • manual entry text box  (value must be > 0)
• Assign Group Weights
  • If toggle is set to 'No', no further options are displayed
  • If toggle is set to 'Yes':
    • Groups Weights Table will display
      • Group Name
        • manual entry text box
      • Test Taker Selection Query
        • single-select drop down (with search feature) that includes all Test Taker Selection queries configured for the program
          • Query type must be Test Taker Selection
          • Available values displayed in alphabetical order
          • See Queries for additional details.
      • Target Percentage 
        • manual entry text box   (value must be > 0)
      • Additional groups - when multiple groups are desired, select '+' in the Add/Delete Groups column to add row(s), and populate Group, Test Taker Selection Query and Target Percentage for each group.
        • If a group is added, Save will be disabled until all required fields of Group, Test Taker Selection Query and Target Percentage have been filled.
        • Once a group row is added, there is a Delete icon (trash can) displayed next to each row in the Add/Delete Groups column.  Any row can be deleted.  The Delete icon disappears if only one row remains.
        • A minimum of one group is required for an Item Response Theory - Calibration template to be saved.
• Use Predictor Vectors for Concurrent Calibrations
  • toggle No/Yes

• 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 Ability Distributions by Form
  • toggle No/Yes
• Additional Item Summaries 
  • If toggle is set to 'No', no further options are displayed.
  • If toggle is set to 'Yes':
    • Produce Item Summaries by
      • multi-select option to configure if Item Summaries should be complete by Form, AU, and/or LIC.

• Produce ICC Plots 
  • If toggle is set to 'No', no further options are displayed.
  • If toggle is set to 'Yes':
    • Dichotomous Items - 95% Confidence Bands 
      • toggle No/Yes
    • Polytomous Items - Plot Overall ICC Curve
      • toggle No/Yes
    • Size of Population Marker
      • single select option to configure if marker should be proportional to total population at each Ability Group or Constant.

• Flag Items
  • If toggle is set to 'No', no further options are displayed
  • If toggle is set to 'Yes':
    • a parameter
      • 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
      • 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