Item Characteristic Curve and Item Information Function: Item16

skill_level: 5 p: 0.969 skill_level: 4 p: 0.921 skill_level: 3 p: 0.81 skill_level: 2 p: 0.611 skill_level: 1 p: 0.366 skill_level: 2 iif: 0.238 skill_level: 1 iif: 0.232 skill_level: 0 p: 0.175 skill_level: 3 iif: 0.154 skill_level: 0 iif: 0.144 skill_level: 4 iif: 0.0731 skill_level: -1 p: 0.0724 skill_level: -1 p: 0.0724 skill_level: -1 p: 0.0724 skill_level: -1 p: 0.0724 skill_level: -1 p: 0.0724 skill_level: -1 iif: 0.0672 skill_level: 5 iif: 0.0298 skill_level: -2 iif: 0.0271 skill_level: -2 p: 0.0279 skill_level: -3 iif: 0.0103 skill_level: -3 p: 0.0105 skill_level: -3 p: 0.0105 skill_level: -3 p: 0.0105 skill_level: -3 p: 0.0105 skill_level: -4 iif: 0.00385740793226 skill_level: -4 p: 0.00387240344067 skill_level: -5 iif: 0.0014260338951 skill_level: -5 p: 0.00142807328842
Plot of iif * skill_level


Distracter analysis table: Item16

The FREQ Procedure

Frequency
Col Pct
Table of A16 by Skill_level
A16(A16) Skill_level Total
-2 -1 0 1 2 3 4
A 2
16.67		 17
13.08		 81
15.20		 76
8.34		 32
3.71		 11
2.41		 2
0.83		 221
 
B 5
41.67		 48
36.92		 155
29.08		 262
28.76		 185
21.46		 61
13.35		 11
4.58		 727
 
C 3
25.00		 47
36.15		 177
33.21		 234
25.69		 142
16.47		 32
7.00		 4
1.67		 639
 
D 2
16.67		 18
13.85		 120
22.51		 339
37.21		 503
58.35		 353
77.24		 223
92.92		 1558
 
Total 12 130 533 911 862 457 240 3145
Frequency Missing = 37


Distractor analysis plot: Item16

Skill_level: 4 prob: 0.929 A16: D Skill_level: 3 prob: 0.772 A16: D Skill_level: 2 prob: 0.584 A16: D Skill_level: -2 prob: 0.417 A16: B Skill_level: 1 prob: 0.372 A16: D Skill_level: -1 prob: 0.369 A16: B Skill_level: -1 prob: 0.362 A16: C Skill_level: -1 prob: 0.362 A16: C Skill_level: -1 prob: 0.362 A16: C Skill_level: 0 prob: 0.332 A16: C Skill_level: 0 prob: 0.291 A16: B Skill_level: 1 prob: 0.288 A16: B Skill_level: 1 prob: 0.257 A16: C Skill_level: -2 prob: 0.25 A16: C Skill_level: 0 prob: 0.225 A16: D Skill_level: 2 prob: 0.215 A16: B Skill_level: -2 prob: 0.167 A16: D Skill_level: 2 prob: 0.165 A16: C Skill_level: -2 prob: 0.167 A16: A Skill_level: 0 prob: 0.152 A16: A Skill_level: -1 prob: 0.138 A16: D Skill_level: 3 prob: 0.133 A16: B Skill_level: -1 prob: 0.131 A16: A Skill_level: 1 prob: 0.0834 A16: A Skill_level: 3 prob: 0.07 A16: C Skill_level: 4 prob: 0.0458 A16: B Skill_level: 2 prob: 0.0371 A16: A Skill_level: 3 prob: 0.0241 A16: A Skill_level: 4 prob: 0.0167 A16: C Skill_level: 4 prob: 0.00833333333333 A16: A
Plot of prob * Skill_level = A16


Distractor analysis plot: Item16

KEY16
D