Turning Technologies TurningPoint - Manual (Page 243)

TurningPoint for Office 2003 User Guide 243
Types of Reports
Discrimination/Difficulty Indexes Report
Displays the discrimination/difficulty index on a per question basis. The indexes are determined by the
number of correct responses in the upper half and lower half of the participants, divided by the total
responses in the top and lower groups.
Formula for the Difficulty Index:
• D = Difficulty Index
• NH = Number of correct responses in the top 27%* (participants who responded with the most number
of correct answers during the session)
• NL = Number of correct responses in lower 27%* (participants who responded with the least number
of correct answers during the session)
• T = Number of total responses in the top and lower groups
• D = (NH + NL) / T
Formula for the Discrimination Index:
• D = Discrimination Index
• NH = Number of correct responses in the top 27%* (participants who responded with the most number
of correct answers during the session)
• NL = Number of correct responses in lower 27%* (participants who responded with the least number
of correct answers during the session)
• T = Number of total responses in the top and lower groups
• D = (NH - NL) / .5(T)
*If there is a tie determining the top and lower percentiles the participants will be sorted based on the
Device ID of the response device.
Moment to Moment Report
Moment to Moment Report shows a chart of the moment to moment rating results.
Outline Report
The Outline Report provides an outline of slide questions and answers. The outline shows all answer
values.