Item Characteristic Curve and Item Information Function: Item33

skill_level: 5 p: 0.981 skill_level: 4 p: 0.951 skill_level: 3 p: 0.877 skill_level: 2 p: 0.723 skill_level: 1 p: 0.49 skill_level: 0 p: 0.261 skill_level: 1 iif: 0.25 skill_level: 2 iif: 0.2 skill_level: 0 iif: 0.193 skill_level: -1 p: 0.115 skill_level: -1 p: 0.115 skill_level: -1 p: 0.115 skill_level: 3 iif: 0.108 skill_level: -1 iif: 0.102 skill_level: 4 iif: 0.0468 skill_level: -2 iif: 0.0436 skill_level: -2 p: 0.0457 skill_level: -2 p: 0.0457 skill_level: -2 p: 0.0457 skill_level: 5 iif: 0.0184 skill_level: -3 iif: 0.017 skill_level: -3 p: 0.0173 skill_level: -3 p: 0.0173 skill_level: -4 iif: 0.00639073644758 skill_level: -4 p: 0.00643210846691 skill_level: -5 iif: 0.00237025566294 skill_level: -5 p: 0.00237590056644 skill_level: -5 p: 0.00237590056644
Plot of iif * skill_level


Distracter analysis table: Item33

The FREQ Procedure

Frequency
Col Pct
Table of A33 by Skill_level
A33(A33) Skill_level Total
-2 -1 0 1 2 3 4
A 5
50.00		 21
16.28		 91
17.27		 152
16.72		 89
10.29		 30
6.58		 7
2.92		 395
 
B 3
30.00		 47
36.43		 221
41.94		 229
25.19		 101
11.68		 30
6.58		 2
0.83		 633
 
C 0
0.00		 33
25.58		 153
29.03		 439
48.29		 624
72.14		 380
83.33		 230
95.83		 1859
 
D 2
20.00		 28
21.71		 62
11.76		 89
9.79		 51
5.90		 16
3.51		 1
0.42		 249
 
Total 10 129 527 909 865 456 240 3136
Frequency Missing = 37


Distractor analysis plot: Item33

Skill_level: 4 prob: 0.958 A33: C Skill_level: 3 prob: 0.833 A33: C Skill_level: 2 prob: 0.721 A33: C Skill_level: -2 prob: 0.5 A33: A Skill_level: 1 prob: 0.483 A33: C Skill_level: 0 prob: 0.419 A33: B Skill_level: -1 prob: 0.364 A33: B Skill_level: -2 prob: 0.3 A33: B Skill_level: 0 prob: 0.29 A33: C Skill_level: -1 prob: 0.256 A33: C Skill_level: 1 prob: 0.252 A33: B Skill_level: -1 prob: 0.217 A33: D Skill_level: -2 prob: 0.2 A33: D Skill_level: 0 prob: 0.173 A33: A Skill_level: 1 prob: 0.167 A33: A Skill_level: -1 prob: 0.163 A33: A Skill_level: 2 prob: 0.117 A33: B Skill_level: 0 prob: 0.118 A33: D Skill_level: 2 prob: 0.103 A33: A Skill_level: 1 prob: 0.0979 A33: D Skill_level: 3 prob: 0.0658 A33: B Skill_level: 3 prob: 0.0658 A33: A Skill_level: 2 prob: 0.059 A33: D Skill_level: 3 prob: 0.0351 A33: D Skill_level: 4 prob: 0.0292 A33: A Skill_level: 4 prob: 0.00833333333333 A33: B Skill_level: 4 prob: 0.00416666666666 A33: D Skill_level: 4 prob: 0.00416666666666 A33: D Skill_level: 4 prob: 0.00416666666666 A33: D
Plot of prob * Skill_level = A33


Distractor analysis plot: Item33

KEY33
C