Item Characteristic Curve and Item Information Function: Item42

skill_level: 5 p: 0.99 skill_level: 4 p: 0.981 skill_level: 3 p: 0.951 skill_level: 2 p: 0.878 skill_level: 1 p: 0.725 skill_level: 0 p: 0.493 skill_level: -1 p: 0.263 skill_level: 0 iif: 0.25 skill_level: 1 iif: 0.199 skill_level: -1 iif: 0.194 skill_level: -2 p: 0.116 skill_level: -2 p: 0.116 skill_level: -2 p: 0.116 skill_level: 2 iif: 0.107 skill_level: -2 iif: 0.103 skill_level: 3 iif: 0.0464 skill_level: -3 iif: 0.044 skill_level: -3 p: 0.0461 skill_level: -3 p: 0.0461 skill_level: -3 p: 0.0461 skill_level: -3 p: 0.0461 skill_level: 4 iif: 0.0182 skill_level: -4 iif: 0.0172 skill_level: -4 p: 0.0175 skill_level: 5 iif: 0.00684772834107 skill_level: -5 iif: 0.00645412995118 skill_level: -5 p: 0.00649633228433
Plot of iif * skill_level


Distracter analysis table: Item42

The FREQ Procedure

Frequency
Col Pct
Table of A42 by Skill_level
A42(A42) Skill_level Total
-2 -1 0 1 2 3 4
A 3
27.27		 33
25.19		 97
18.16		 134
14.73		 80
9.26		 23
5.03		 3
1.25		 373
 
B 4
36.36		 22
16.79		 33
6.18		 22
2.42		 9
1.04		 3
0.66		 0
0.00		 93
 
C 3
27.27		 48
36.64		 293
54.87		 642
70.55		 748
86.57		 426
93.22		 236
98.33		 2396
 
D 1
9.09		 28
21.37		 111
20.79		 112
12.31		 27
3.13		 5
1.09		 1
0.42		 285
 
Total 11 131 534 910 864 457 240 3147
Frequency Missing = 37


Distractor analysis plot: Item42

Skill_level: 4 prob: 0.983 A42: C Skill_level: 3 prob: 0.932 A42: C Skill_level: 2 prob: 0.866 A42: C Skill_level: 1 prob: 0.705 A42: C Skill_level: 0 prob: 0.549 A42: C Skill_level: -1 prob: 0.366 A42: C Skill_level: -2 prob: 0.364 A42: B Skill_level: -2 prob: 0.273 A42: C Skill_level: -2 prob: 0.273 A42: A Skill_level: -1 prob: 0.252 A42: A Skill_level: -1 prob: 0.214 A42: D Skill_level: 0 prob: 0.208 A42: D Skill_level: 0 prob: 0.182 A42: A Skill_level: -1 prob: 0.168 A42: B Skill_level: 1 prob: 0.147 A42: A Skill_level: 1 prob: 0.123 A42: D Skill_level: 2 prob: 0.0926 A42: A Skill_level: -2 prob: 0.0909 A42: D Skill_level: 0 prob: 0.0618 A42: B Skill_level: 3 prob: 0.0503 A42: A Skill_level: 2 prob: 0.0313 A42: D Skill_level: 3 prob: 0.0109 A42: D Skill_level: 3 prob: 0.0109 A42: D Skill_level: 1 prob: 0.0242 A42: B Skill_level: 4 prob: 0.0125 A42: A Skill_level: 4 prob: 0.0125 A42: A Skill_level: 2 prob: 0.0104 A42: B Skill_level: 3 prob: 0.00656455142231 A42: B Skill_level: 4 prob: 0.00416666666666 A42: D Skill_level: 4 prob: 0.00416666666666 A42: D Skill_level: 4 prob: 0.00416666666666 A42: D
Plot of prob * Skill_level = A42


Distractor analysis plot: Item42

KEY42
C