Psychometrics 101: Know What your Assessment Data is Telling You
Recently, Eric Ermie, Executive Director of Sales for ExamSoft Worldwide, discussed the fundamentals of item analysis and the steps involved in placing data into its proper context in his webinar, “Psychometrics101: Know What your Assessment Data is Telling You.”
The key takeaways from her presentation include:
1. There are many exam data points that can be used for item analysis and revision
2. Item analysis data points can be interpreted in many different ways, educators should remember that context is important when considering the data
3. ExamSoft's embedded assessment platform can aggregate this information for educators, in order for them to make more informed decisions regarding exam content
Ermie’s presentation provides insight on interpreting exam statistics and the importance of deciphering analytical data from the perspective of your program’s specific needs. He uses examples of item analysis reports to explain functions of common exam statistics including item difficulty, discrimination index, and point bi-serial.
“I’m very much against hard and fast rules when it comes to assessment. Remember that with any statistic, context matters.”
You can view a PDF copy of the presentation here.