Calibration
The Calibration menu allows the administrator to periodically calibrate new, approved items from the database of items created in the Editing module. Calibrating an item means that it is assigned a difficulty level (between -3 and +3). Contained within the SLPT platform is a function that determines an item's statistical difficulty level after a sufficient number of respondents have answered the question.
The Calibration of the items list includes the unique identifier (ID code) of all approved (but uncalibrated) items, as well as the Number of respondents to have answered the question.
To calibrate approved items:
- Click the Calibrate link.
- After calibration, the list of items disappears and their assigned Difficulty level appears in each item's Properties section in the Editing module.