Adjusting the regression intercept

Where borderline regression is used for standard setting the exam, the item cut score is set at the point on the total score axis at which the regression line of best fit intersects the "borderline" (or similar) specified value on the global rating axis. This is shown in the image below whereby the regression line intersects the Borderline values at 42.14 on the total score axis. 

By default, when creating a site schema (measurement scale) for use in a global criterion, the default borderline value is always set at 1.00 on the scale. This can be changed as a site-wide default on request, however to afford even greater flexibility and control it is also possible to adjust this value per exam or even per item during the standard setting process.

Using adjustable borderline regression

To enable this option select Adjustable borderline regression from the set standard screen. This enables the Adjust borderline marker button. This feature is also available for the McManus standard setting method. Click the button to get started.

Changing all borderline markers at once

The top section of the screen allows you to change the borderline marker for each item in the exam to a consistent value.

Type in a new value for the borderline marker and Apply the value above to all items. The borderline point on the global score axes will now move and the intercept point on the total score axis will change accordingly for all stations. You can use Download PDF report button to check the changes.

Changing borderline values for individual items

Alternatively, you can change the value for individual items in the exam. Navigate to an individual item in the list and input your new value for the borderline marker.

Click Apply and observe the change to the vertical line denoting the borderline marker.

In the above example, the borderline marker now sits at 1.2 on the global rating axis, which means the intercept point on the total score axis (and therefore the passing score) has been adjusted from 42.14 to 45.33.