Item Characteristic Curve and Item Information Function: Item48

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: Item48

The FREQ Procedure

Frequency
Col Pct
Table of A48 by Skill_level
A48(A48) Skill_level Total
-2 -1 0 1 2 3 4
A 1
8.33		 41
31.54		 236
44.44		 655
71.90		 788
91.20		 435
95.19		 239
99.58		 2395
 
B 3
25.00		 23
17.69		 118
22.22		 122
13.39		 41
4.75		 10
2.19		 0
0.00		 317
 
C 3
25.00		 40
30.77		 115
21.66		 67
7.35		 13
1.50		 2
0.44		 0
0.00		 240
 
D 5
41.67		 26
20.00		 62
11.68		 67
7.35		 22
2.55		 10
2.19		 1
0.42		 193
 
Total 12 130 531 911 864 457 240 3145
Frequency Missing = 37


Distractor analysis plot: Item48

Skill_level: 4 prob: 1 A48: A Skill_level: 3 prob: 0.952 A48: A Skill_level: 2 prob: 0.912 A48: A Skill_level: 1 prob: 0.719 A48: A Skill_level: 0 prob: 0.444 A48: A Skill_level: -2 prob: 0.417 A48: D Skill_level: -1 prob: 0.315 A48: A Skill_level: -1 prob: 0.315 A48: A Skill_level: -1 prob: 0.315 A48: A Skill_level: -1 prob: 0.308 A48: C Skill_level: -1 prob: 0.308 A48: C Skill_level: -2 prob: 0.25 A48: B Skill_level: -2 prob: 0.25 A48: C Skill_level: -2 prob: 0.25 A48: C Skill_level: -2 prob: 0.25 A48: C Skill_level: -2 prob: 0.25 A48: C Skill_level: -2 prob: 0.25 A48: C Skill_level: 0 prob: 0.222 A48: B Skill_level: 0 prob: 0.217 A48: C Skill_level: 0 prob: 0.217 A48: C Skill_level: 0 prob: 0.217 A48: C Skill_level: 0 prob: 0.217 A48: C Skill_level: -1 prob: 0.2 A48: D Skill_level: -1 prob: 0.177 A48: B Skill_level: 1 prob: 0.134 A48: B Skill_level: 0 prob: 0.117 A48: D Skill_level: -2 prob: 0.0833 A48: A Skill_level: 1 prob: 0.0735 A48: D Skill_level: 1 prob: 0.0735 A48: D Skill_level: 1 prob: 0.0735 A48: D Skill_level: 1 prob: 0.0735 A48: D Skill_level: 1 prob: 0.0735 A48: C Skill_level: 2 prob: 0.0475 A48: B Skill_level: 2 prob: 0.0255 A48: D Skill_level: 3 prob: 0.0219 A48: D Skill_level: 3 prob: 0.0219 A48: D Skill_level: 3 prob: 0.0219 A48: D Skill_level: 3 prob: 0.0219 A48: D Skill_level: 3 prob: 0.0219 A48: B Skill_level: 2 prob: 0.015 A48: C Skill_level: 4 prob: 0.00416666666666 A48: D Skill_level: 3 prob: 0.00437636761487 A48: C
Plot of prob * Skill_level = A48


Distractor analysis plot: Item48

KEY48
A