Effect of Item Difficulty
No. 1, Type 1 MC, a is 0.0150. b is 250.000, c is 0.1
No. 2, Type 1 MC, a is 0.0150, b is 375.000, c is 0.1
No.3 Type 1 MC, a is 0.0150, b is 300.000, c is 0.1
No. 4, Type 1 MC, a is 0.0150, b is 325.000, c is 0.1
No. 5, Type 1 MC, a is 0.0150, b is 350.000, c is 0.1
Response patterns (1 equals correct)
Pattern 12345: 11101, SEM is 43, SS is 300
Pattern 12345: 01110, SEM is 43, SS is 305
Pattern 12345: 10101, SEM is 43, SS is 305
Pattern 12345: 10011, SEM is 43, SS is 310
Answering more difficult items (b-parameter) can result in higher scores.