Item Characteristic Curve and Item Information Function: Item41

skill_level: 5 p: 0.99 skill_level: 4 p: 0.983 skill_level: 3 p: 0.954 skill_level: 2 p: 0.884 skill_level: 1 p: 0.737 skill_level: 0 p: 0.507 skill_level: -1 p: 0.275 skill_level: 0 iif: 0.25 skill_level: -1 iif: 0.199 skill_level: 1 iif: 0.194 skill_level: -2 p: 0.122 skill_level: -2 p: 0.122 skill_level: -2 p: 0.122 skill_level: -2 iif: 0.107 skill_level: 2 iif: 0.103 skill_level: -3 iif: 0.0464 skill_level: -3 p: 0.0488 skill_level: -3 p: 0.0488 skill_level: -3 p: 0.0488 skill_level: 3 iif: 0.044 skill_level: 4 iif: 0.0172 skill_level: -4 iif: 0.0182 skill_level: -4 p: 0.0185 skill_level: -4 p: 0.0185 skill_level: -4 p: 0.0185 skill_level: 5 iif: 0.00645412995118 skill_level: -5 iif: 0.00684772834107 skill_level: -5 p: 0.00689527313264
Plot of iif * skill_level


Distracter analysis table: Item41

The FREQ Procedure

Frequency
Col Pct
Table of A41 by Skill_level
A41(A41) Skill_level Total
-2 -1 0 1 2 3 4
A 6
50.00		 32
24.81		 107
20.08		 95
10.43		 32
3.71		 7
1.53		 0
0.00		 279
 
B 2
16.67		 46
35.66		 242
45.40		 644
70.69		 800
92.70		 447
97.81		 240
100.00		 2421
 
C 2
16.67		 22
17.05		 87
16.32		 77
8.45		 14
1.62		 2
0.44		 0
0.00		 204
 
D 2
16.67		 29
22.48		 97
18.20		 95
10.43		 17
1.97		 1
0.22		 0
0.00		 241
 
Total 12 129 533 911 863 457 240 3145
Frequency Missing = 37


Distractor analysis plot: Item41

Skill_level: 4 prob: 1 A41: B Skill_level: 3 prob: 0.978 A41: B Skill_level: 2 prob: 0.927 A41: B Skill_level: 1 prob: 0.707 A41: B Skill_level: -2 prob: 0.5 A41: A Skill_level: 0 prob: 0.454 A41: B Skill_level: -1 prob: 0.357 A41: B Skill_level: -1 prob: 0.248 A41: A Skill_level: -1 prob: 0.225 A41: D Skill_level: 0 prob: 0.201 A41: A Skill_level: 0 prob: 0.182 A41: D Skill_level: -2 prob: 0.167 A41: D Skill_level: -2 prob: 0.167 A41: D Skill_level: -1 prob: 0.171 A41: C Skill_level: -2 prob: 0.167 A41: B Skill_level: -2 prob: 0.167 A41: C Skill_level: -2 prob: 0.167 A41: C Skill_level: -2 prob: 0.167 A41: C Skill_level: -2 prob: 0.167 A41: C Skill_level: -2 prob: 0.167 A41: C Skill_level: 0 prob: 0.163 A41: C Skill_level: 1 prob: 0.104 A41: D Skill_level: 1 prob: 0.104 A41: A Skill_level: 1 prob: 0.0845 A41: C Skill_level: 2 prob: 0.0371 A41: A Skill_level: 3 prob: 0.0153 A41: A Skill_level: 2 prob: 0.0162 A41: C Skill_level: 3 prob: 0.00218818380743 A41: D Skill_level: 3 prob: 0.00218818380743 A41: D Skill_level: 3 prob: 0.00437636761487 A41: C Skill_level: 3 prob: 0.00437636761487 A41: C Skill_level: 3 prob: 0.00437636761487 A41: C Skill_level: 3 prob: 0.00437636761487 A41: C
Plot of prob * Skill_level = A41


Distractor analysis plot: Item41

KEY41
B