Item Characteristic Curve and Item Information Function: Item32

skill_level: 5 p: 0.975 skill_level: 4 p: 0.935 skill_level: 3 p: 0.842 skill_level: 2 p: 0.662 skill_level: 1 p: 0.418 skill_level: 1 iif: 0.243 skill_level: 2 iif: 0.224 skill_level: 0 p: 0.209 skill_level: 0 iif: 0.165 skill_level: 3 iif: 0.133 skill_level: -1 p: 0.0887 skill_level: -1 p: 0.0887 skill_level: -1 p: 0.0887 skill_level: -1 iif: 0.0808 skill_level: 4 iif: 0.0606 skill_level: -2 iif: 0.0334 skill_level: -2 p: 0.0346 skill_level: -2 p: 0.0346 skill_level: -2 p: 0.0346 skill_level: -2 p: 0.0346 skill_level: 5 iif: 0.0242 skill_level: -3 iif: 0.0128 skill_level: -3 p: 0.013 skill_level: -3 p: 0.013 skill_level: -3 p: 0.013 skill_level: -3 p: 0.013 skill_level: -4 iif: 0.00479747879302 skill_level: -4 p: 0.00482071811618 skill_level: -4 p: 0.00482071811618 skill_level: -4 p: 0.00482071811618 skill_level: -5 iif: 0.00177569941746 skill_level: -5 p: 0.00177886377378
Plot of iif * skill_level


Distracter analysis table: Item32

The FREQ Procedure

Frequency
Col Pct
Table of A32 by Skill_level
A32(A32) Skill_level Total
-2 -1 0 1 2 3 4
A 2
22.22		 28
21.88		 110
20.87		 227
25.00		 222
25.72		 96
21.01		 36
15.00		 721
 
B 1
11.11		 36
28.13		 254
48.20		 440
48.46		 458
53.07		 314
68.71		 188
78.33		 1691
 
C 3
33.33		 34
26.56		 126
23.91		 199
21.92		 156
18.08		 36
7.88		 9
3.75		 563
 
D 3
33.33		 30
23.44		 37
7.02		 42
4.63		 27
3.13		 11
2.41		 7
2.92		 157
 
Total 9 128 527 908 863 457 240 3132
Frequency Missing = 37


Distractor analysis plot: Item32

Skill_level: 4 prob: 0.783 A32: B Skill_level: 3 prob: 0.687 A32: B Skill_level: 2 prob: 0.531 A32: B Skill_level: 1 prob: 0.485 A32: B Skill_level: 0 prob: 0.482 A32: B Skill_level: -2 prob: 0.333 A32: D Skill_level: -2 prob: 0.333 A32: D Skill_level: -2 prob: 0.333 A32: D Skill_level: -2 prob: 0.333 A32: D Skill_level: -2 prob: 0.333 A32: C Skill_level: -1 prob: 0.281 A32: B Skill_level: -1 prob: 0.266 A32: C Skill_level: 2 prob: 0.257 A32: A Skill_level: 1 prob: 0.25 A32: A Skill_level: 0 prob: 0.239 A32: C Skill_level: -1 prob: 0.234 A32: D Skill_level: -2 prob: 0.222 A32: A Skill_level: 1 prob: 0.219 A32: C Skill_level: -1 prob: 0.219 A32: A Skill_level: 3 prob: 0.21 A32: A Skill_level: 0 prob: 0.209 A32: A Skill_level: 2 prob: 0.181 A32: C Skill_level: 4 prob: 0.15 A32: A Skill_level: -2 prob: 0.111 A32: B Skill_level: 3 prob: 0.0788 A32: C Skill_level: 0 prob: 0.0702 A32: D Skill_level: 1 prob: 0.0463 A32: D Skill_level: 4 prob: 0.0375 A32: C Skill_level: 2 prob: 0.0313 A32: D Skill_level: 4 prob: 0.0292 A32: D Skill_level: 3 prob: 0.0241 A32: D
Plot of prob * Skill_level = A32


Distractor analysis plot: Item32

KEY32
B