6. June 2010 compared to January 2011 Was there a test bias? Was one test “more difficult?” Part 1: Total test score. 96 point increase 75 point decrease 21 point net increase for January 21 point net increase / 20 “sample students” On average a 1.05 point increase in January from June
7. June 2010 compared to January 2011 Was there a test bias? Was one test “more difficult?” Part 2: Multiple Choice score. 26 point increase 47 point decrease 21 point net decrease 21 point net decrease / 20 “sample students” On average a 1.05 point decrease in January from June
8. June 2010 compared to January 2011 Was there a test bias? Was one test “more difficult?” Part 3: Essay score. 20 point increase 7 point decrease 13 point net increase 13 point net increase / 20 “sample students” On average a .65 point increase in January from June
9. June 2010 compared to January 2011 Part 1: Total test score = 1.05 point increase Part 2: Multiple Choice score = 1.05 point decrease Part 3: Essay Score = .65 point increase Conclusion: Evidence does not support a test bias. One test more difficult that the other.