Graphical Diagnostic Map

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The Graphical Diagnostic Map displays the same information as the Diagnostic Map, in an HTML format.

  1. To see a Graphical Diagnostic Map for a student, first select the student, then select Reports – Individual Reports - Graphical Diagnostic Map from the menu. You will be presented with a dialog window of the display options listed in the table below.
  2. Dialog Graph Diag 1.png Dialog Graph Diag 2.png
    Figure 1. Graphical Diagnostic Map Display Options dialog windows.

    Table 1. Display options for a Graphical Diagnostic Map.
    Option Description
    Title The title you provide will appear at the top of the report.
    File Name Use the Browse... button to select the folder you want and then enter the filename you want the map to be stored in. ConstructMap will automatically store the report as an HTML file, so you do not need to add the .html to your filename.
    Item Set Browse... to the Item Set that you want included. If you want to see all of the items, select the “base” Item Set.
    Display Item Names Select Yes if you want to see item names in the report; select No if you want to see item numbers.
    Display All Active Items Select Yes if you want to see all active items including those the student did not complete.
    Max. Range Set the maximum logit value to display.
    Min. Range Set the minimum logit value to display.
    Rows/Interval Select Interval to set the logit interval for each row, or select Row to set the number of rows per page.
    Table Width Set the percentage of the screen that you want the Kid Map to cover. 50% is a reasonable value for small Item Sets. You may need a larger percentage for larger Item Sets.
    Left Column Heading Title for the left column, which shows the respondent’s non-zero responses on each item.
    Right Column Heading Title for the right column, which shows one level above the respondent’s response level on each item.
    Respondent Location Range Use the Change Color button to change the color of the respondent’s location range. This is the area in which responses are equally likely on the left or right side of the chart. The color you select will be used at the mean location, with a lighter shade extending above and below that location to represent an interval of one standard deviation from the mean.
    Unexpected Range Use the Change Color button to change the color of the two unexpected ranges for responses: those in the lower right section and those in the upper left section.


  3. The Graphical Diagnostic Map dialog window shown in Figure 1 was used to produce the examples in this section.
  4. Figure 3. Graphical Diagnostic Map for Anne Jackson on DCI variable after Item Set "29-38."

    Note that the “unexpected” ranges in the upper left and lower right corners are highlighted. These are the ranges where we do not expect to see responses. The shaded band in the middle of the graph shows the respondent’s current level of performance. Item scores in this area, on both sides of the chart, are those the respondent is equally likely to achieve or not achieve. Responses in the unshaded sections in the upper right and lower left corners are expected. See the Diagnostic Map section for more information about interpreting the Map.