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Simulation code ready

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Corentin Choisy 12 months ago
parent 466c2a1277
commit c0cdde3a03
4 changed files with 1572 additions and 115 deletions
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201
Data\scenario_1A.csv
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@ -0,0 +1,201 @@
id,lt1,item1,item2,item3,item4,TT,replication
1,.17644101,0,0,0,1,0,1
2,1.1119704,0,1,1,1,0,1
3,-.46370447,0,1,0,1,0,1
4,-1.0415101,1,0,1,0,0,1
5,-1.2738965,1,0,0,0,0,1
6,-.085420959,1,1,0,1,0,1
7,1.1056501,1,1,1,1,0,1
8,-.32086244,1,0,1,0,0,1
9,.54192197,1,0,0,0,0,1
10,.49705315,1,1,0,1,0,1
11,-.64607531,1,1,0,1,0,1
12,.51508766,0,1,1,0,0,1
13,.2836611,0,0,0,1,0,1
14,-.63813239,1,1,1,0,0,1
15,1.4577918,1,1,1,1,0,1
16,-.9888711,1,0,1,0,0,1
17,-1.8077854,1,0,0,0,0,1
18,-.36925948,1,0,0,0,0,1
19,.17932144,1,0,0,0,0,1
20,-.63588434,0,1,0,1,0,1
21,.86244547,0,0,0,0,0,1
22,-.44217664,1,0,0,0,0,1
23,-.38870588,1,1,1,0,0,1
24,.95358348,1,1,0,0,0,1
25,-.36753294,1,0,1,0,0,1
26,-.63655686,0,0,0,0,0,1
27,-.012073237,1,1,1,0,0,1
28,-.13124834,1,0,1,0,0,1
29,-.14458376,1,0,1,0,0,1
30,-.25078735,1,1,0,0,0,1
31,-.16138455,1,1,1,0,0,1
32,.75585234,1,0,1,1,0,1
33,-.60850286,1,0,1,0,0,1
34,.79716212,1,0,1,0,0,1
35,.45342034,1,1,1,0,0,1
36,-2.1057169,0,0,0,0,0,1
37,.79157275,1,0,0,1,0,1
38,-.66571254,0,1,0,0,0,1
39,-.097855851,1,1,0,1,0,1
40,1.0418533,1,0,1,1,0,1
41,-.46935579,0,0,0,0,0,1
42,.63163638,1,1,0,0,0,1
43,.085910544,0,1,1,1,0,1
44,.83931607,1,0,0,0,0,1
45,.50145197,1,1,1,0,0,1
46,2.5159037,0,1,1,1,0,1
47,-.29928276,1,1,0,0,0,1
48,-.52162999,1,1,0,1,0,1
49,1.7009553,1,1,1,1,0,1
50,-.44088203,1,0,1,0,0,1
51,1.5880907,1,1,0,0,0,1
52,-.47029325,0,0,0,0,0,1
53,1.2277231,1,1,0,1,0,1
54,.42639166,1,0,1,1,0,1
55,-.95310265,0,0,0,0,0,1
56,.64398259,1,0,1,1,0,1
57,.18478298,1,1,0,1,0,1
58,.82810265,1,0,1,1,0,1
59,-.33021048,1,0,0,0,0,1
60,-3.170429,0,0,0,0,0,1
61,-1.1574296,0,1,1,0,0,1
62,1.8837459,1,1,0,0,0,1
63,-1.2181894,0,0,0,0,0,1
64,1.2980061,1,1,1,1,0,1
65,-.32206535,1,1,0,0,0,1
66,-.42526674,0,0,0,0,0,1
67,1.3604238,0,1,0,1,0,1
68,-1.6900293,0,0,0,0,0,1
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70,.46692941,0,0,0,0,0,1
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72,-.20302044,0,1,1,1,0,1
73,-.48481002,0,0,0,0,0,1
74,.18501657,0,0,1,0,0,1
75,-1.5757569,1,0,0,0,0,1
76,.225288,0,0,0,0,0,1
77,.40944499,0,1,1,1,0,1
78,.03514893,1,1,0,1,0,1
79,-2.0809295,0,0,1,0,0,1
80,.89514649,1,1,1,0,0,1
81,-1.3915017,1,0,0,1,0,1
82,.11379968,1,1,0,0,0,1
83,1.5646211,1,1,1,1,0,1
84,-.31079024,1,0,1,0,0,1
85,1.2880181,1,1,1,1,0,1
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88,-.17450906,1,1,0,0,0,1
89,-1.8440282,0,0,1,0,0,1
90,-.13284066,0,1,0,0,0,1
91,1.5515995,1,1,1,1,0,1
92,-.78718334,1,0,0,0,0,1
93,-.28649214,1,0,1,1,0,1
94,.65451664,1,1,0,0,0,1
95,.26079011,0,0,0,1,0,1
96,1.4207528,1,1,1,0,0,1
97,-.36326984,0,1,0,0,0,1
98,-.0092543131,1,1,0,1,0,1
99,.73671579,0,1,1,1,0,1
100,.078362353,1,0,0,1,0,1
101,-.24513553,1,1,0,0,1,1
102,-.85109341,1,1,1,0,1,1
103,-2.2168906,1,0,0,0,1,1
104,-.65738457,0,1,0,0,1,1
105,.00074740726,1,0,0,1,1,1
106,1.204085,1,1,1,1,1,1
107,.74587023,1,1,1,0,1,1
108,1.8170407,1,1,1,0,1,1
109,-.35072035,1,1,1,0,1,1
110,-.14632735,1,1,0,0,1,1
111,1.0549366,1,1,1,1,1,1
112,-.011479022,0,0,1,0,1,1
113,.62853611,1,0,1,1,1,1
114,-.33840579,1,0,1,0,1,1
115,-.72323412,1,0,0,1,1,1
116,2.2091029,0,1,0,0,1,1
117,.21428454,1,0,1,0,1,1
118,.66688836,1,1,0,0,1,1
119,-.73199588,1,1,1,0,1,1
120,-.30729398,1,1,0,1,1,1
121,.37092265,0,1,1,1,1,1
122,.6029672,1,1,1,1,1,1
123,.46125323,1,0,0,1,1,1
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125,-.51291251,1,1,1,0,1,1
126,-.17254806,1,0,0,0,1,1
127,.46708295,1,1,0,0,1,1
128,-1.153928,1,1,0,0,1,1
129,1.4594103,1,0,0,0,1,1
130,-.45216542,1,0,0,0,1,1
131,.090173036,1,1,0,0,1,1
132,-.25163296,1,0,0,0,1,1
133,.99079025,1,0,1,0,1,1
134,1.9550312,1,1,1,1,1,1
135,-.74238241,1,0,0,0,1,1
136,2.4380329,1,1,1,1,1,1
137,-2.5176644,0,0,0,0,1,1
138,-1.2309995,1,0,0,0,1,1
139,-.90618628,1,0,1,0,1,1
140,-1.6482364,0,0,0,0,1,1
141,-.66502756,1,0,0,0,1,1
142,1.2219602,1,0,1,1,1,1
143,.51810169,0,1,1,1,1,1
144,.33138105,1,0,1,1,1,1
145,.92467684,1,1,1,0,1,1
146,-.47461674,0,0,1,1,1,1
147,1.2050171,1,1,0,0,1,1
148,1.5156882,1,1,0,0,1,1
149,1.5499333,1,1,1,1,1,1
150,-.063660748,1,0,1,1,1,1
151,.27926692,0,0,1,1,1,1
152,1.800284,1,1,1,1,1,1
153,-2.4724929,0,0,0,0,1,1
154,1.4980674,1,1,1,1,1,1
155,1.0834401,1,0,1,0,1,1
156,-.73209035,0,1,0,0,1,1
157,.10514933,1,1,1,1,1,1
158,1.4848051,1,1,1,0,1,1
159,.48073712,0,1,0,1,1,1
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161,1.3261594,1,1,0,1,1,1
162,.45268533,0,1,0,1,1,1
163,-2.1466103,0,0,0,1,1,1
164,.036299877,1,0,1,1,1,1
165,1.132494,1,1,0,1,1,1
166,-.74459684,1,1,0,0,1,1
167,-1.3133749,0,0,1,0,1,1
168,.24529886,0,0,0,0,1,1
169,-.047662795,1,1,0,0,1,1
170,1.426119,1,1,1,1,1,1
171,-1.6673079,0,0,0,0,1,1
172,-.47215554,0,0,1,0,1,1
173,-1.1029931,0,1,0,0,1,1
174,.02064253,0,1,0,1,1,1
175,-.7602495,1,1,0,0,1,1
176,-1.225958,1,0,0,0,1,1
177,.062465422,1,1,1,0,1,1
178,-1.7623961,0,0,0,0,1,1
179,-.12828347,1,0,1,0,1,1
180,1.4514505,1,1,1,1,1,1
181,-.80989766,1,0,1,0,1,1
182,.18102278,1,1,1,1,1,1
183,-.89957333,1,1,0,1,1,1
184,1.1199794,1,1,0,1,1,1
185,-.45701504,1,0,1,1,1,1
186,.75216359,1,1,0,0,1,1
187,-1.0642035,1,1,1,0,1,1
188,-.297575,1,1,1,1,1,1
189,1.432634,1,1,1,1,1,1
190,.59969848,1,1,1,0,1,1
191,.38591364,0,0,0,1,1,1
192,-.17246659,0,1,0,0,1,1
193,.024799852,1,1,1,0,1,1
194,-.86773324,1,0,1,0,1,1
195,-1.3454363,0,0,0,0,1,1
196,.60606623,1,1,0,1,1,1
197,1.3981689,1,1,1,1,1,1
198,-.22852357,1,1,0,0,1,1
199,-1.6954113,1,0,0,0,1,1
200,-.48686084,0,1,1,0,1,1
1 id lt1 item1 item2 item3 item4 TT replication
2 1 .17644101 0 0 0 1 0 1
3 2 1.1119704 0 1 1 1 0 1
4 3 -.46370447 0 1 0 1 0 1
5 4 -1.0415101 1 0 1 0 0 1
6 5 -1.2738965 1 0 0 0 0 1
7 6 -.085420959 1 1 0 1 0 1
8 7 1.1056501 1 1 1 1 0 1
9 8 -.32086244 1 0 1 0 0 1
10 9 .54192197 1 0 0 0 0 1
11 10 .49705315 1 1 0 1 0 1
12 11 -.64607531 1 1 0 1 0 1
13 12 .51508766 0 1 1 0 0 1
14 13 .2836611 0 0 0 1 0 1
15 14 -.63813239 1 1 1 0 0 1
16 15 1.4577918 1 1 1 1 0 1
17 16 -.9888711 1 0 1 0 0 1
18 17 -1.8077854 1 0 0 0 0 1
19 18 -.36925948 1 0 0 0 0 1
20 19 .17932144 1 0 0 0 0 1
21 20 -.63588434 0 1 0 1 0 1
22 21 .86244547 0 0 0 0 0 1
23 22 -.44217664 1 0 0 0 0 1
24 23 -.38870588 1 1 1 0 0 1
25 24 .95358348 1 1 0 0 0 1
26 25 -.36753294 1 0 1 0 0 1
27 26 -.63655686 0 0 0 0 0 1
28 27 -.012073237 1 1 1 0 0 1
29 28 -.13124834 1 0 1 0 0 1
30 29 -.14458376 1 0 1 0 0 1
31 30 -.25078735 1 1 0 0 0 1
32 31 -.16138455 1 1 1 0 0 1
33 32 .75585234 1 0 1 1 0 1
34 33 -.60850286 1 0 1 0 0 1
35 34 .79716212 1 0 1 0 0 1
36 35 .45342034 1 1 1 0 0 1
37 36 -2.1057169 0 0 0 0 0 1
38 37 .79157275 1 0 0 1 0 1
39 38 -.66571254 0 1 0 0 0 1
40 39 -.097855851 1 1 0 1 0 1
41 40 1.0418533 1 0 1 1 0 1
42 41 -.46935579 0 0 0 0 0 1
43 42 .63163638 1 1 0 0 0 1
44 43 .085910544 0 1 1 1 0 1
45 44 .83931607 1 0 0 0 0 1
46 45 .50145197 1 1 1 0 0 1
47 46 2.5159037 0 1 1 1 0 1
48 47 -.29928276 1 1 0 0 0 1
49 48 -.52162999 1 1 0 1 0 1
50 49 1.7009553 1 1 1 1 0 1
51 50 -.44088203 1 0 1 0 0 1
52 51 1.5880907 1 1 0 0 0 1
53 52 -.47029325 0 0 0 0 0 1
54 53 1.2277231 1 1 0 1 0 1
55 54 .42639166 1 0 1 1 0 1
56 55 -.95310265 0 0 0 0 0 1
57 56 .64398259 1 0 1 1 0 1
58 57 .18478298 1 1 0 1 0 1
59 58 .82810265 1 0 1 1 0 1
60 59 -.33021048 1 0 0 0 0 1
61 60 -3.170429 0 0 0 0 0 1
62 61 -1.1574296 0 1 1 0 0 1
63 62 1.8837459 1 1 0 0 0 1
64 63 -1.2181894 0 0 0 0 0 1
65 64 1.2980061 1 1 1 1 0 1
66 65 -.32206535 1 1 0 0 0 1
67 66 -.42526674 0 0 0 0 0 1
68 67 1.3604238 0 1 0 1 0 1
69 68 -1.6900293 0 0 0 0 0 1
70 69 .46790454 0 0 1 1 0 1
71 70 .46692941 0 0 0 0 0 1
72 71 -1.4733744 1 0 0 0 0 1
73 72 -.20302044 0 1 1 1 0 1
74 73 -.48481002 0 0 0 0 0 1
75 74 .18501657 0 0 1 0 0 1
76 75 -1.5757569 1 0 0 0 0 1
77 76 .225288 0 0 0 0 0 1
78 77 .40944499 0 1 1 1 0 1
79 78 .03514893 1 1 0 1 0 1
80 79 -2.0809295 0 0 1 0 0 1
81 80 .89514649 1 1 1 0 0 1
82 81 -1.3915017 1 0 0 1 0 1
83 82 .11379968 1 1 0 0 0 1
84 83 1.5646211 1 1 1 1 0 1
85 84 -.31079024 1 0 1 0 0 1
86 85 1.2880181 1 1 1 1 0 1
87 86 -.16200012 1 0 1 0 0 1
88 87 -.26236823 0 1 1 0 0 1
89 88 -.17450906 1 1 0 0 0 1
90 89 -1.8440282 0 0 1 0 0 1
91 90 -.13284066 0 1 0 0 0 1
92 91 1.5515995 1 1 1 1 0 1
93 92 -.78718334 1 0 0 0 0 1
94 93 -.28649214 1 0 1 1 0 1
95 94 .65451664 1 1 0 0 0 1
96 95 .26079011 0 0 0 1 0 1
97 96 1.4207528 1 1 1 0 0 1
98 97 -.36326984 0 1 0 0 0 1
99 98 -.0092543131 1 1 0 1 0 1
100 99 .73671579 0 1 1 1 0 1
101 100 .078362353 1 0 0 1 0 1
102 101 -.24513553 1 1 0 0 1 1
103 102 -.85109341 1 1 1 0 1 1
104 103 -2.2168906 1 0 0 0 1 1
105 104 -.65738457 0 1 0 0 1 1
106 105 .00074740726 1 0 0 1 1 1
107 106 1.204085 1 1 1 1 1 1
108 107 .74587023 1 1 1 0 1 1
109 108 1.8170407 1 1 1 0 1 1
110 109 -.35072035 1 1 1 0 1 1
111 110 -.14632735 1 1 0 0 1 1
112 111 1.0549366 1 1 1 1 1 1
113 112 -.011479022 0 0 1 0 1 1
114 113 .62853611 1 0 1 1 1 1
115 114 -.33840579 1 0 1 0 1 1
116 115 -.72323412 1 0 0 1 1 1
117 116 2.2091029 0 1 0 0 1 1
118 117 .21428454 1 0 1 0 1 1
119 118 .66688836 1 1 0 0 1 1
120 119 -.73199588 1 1 1 0 1 1
121 120 -.30729398 1 1 0 1 1 1
122 121 .37092265 0 1 1 1 1 1
123 122 .6029672 1 1 1 1 1 1
124 123 .46125323 1 0 0 1 1 1
125 124 -1.2180696 0 0 0 0 1 1
126 125 -.51291251 1 1 1 0 1 1
127 126 -.17254806 1 0 0 0 1 1
128 127 .46708295 1 1 0 0 1 1
129 128 -1.153928 1 1 0 0 1 1
130 129 1.4594103 1 0 0 0 1 1
131 130 -.45216542 1 0 0 0 1 1
132 131 .090173036 1 1 0 0 1 1
133 132 -.25163296 1 0 0 0 1 1
134 133 .99079025 1 0 1 0 1 1
135 134 1.9550312 1 1 1 1 1 1
136 135 -.74238241 1 0 0 0 1 1
137 136 2.4380329 1 1 1 1 1 1
138 137 -2.5176644 0 0 0 0 1 1
139 138 -1.2309995 1 0 0 0 1 1
140 139 -.90618628 1 0 1 0 1 1
141 140 -1.6482364 0 0 0 0 1 1
142 141 -.66502756 1 0 0 0 1 1
143 142 1.2219602 1 0 1 1 1 1
144 143 .51810169 0 1 1 1 1 1
145 144 .33138105 1 0 1 1 1 1
146 145 .92467684 1 1 1 0 1 1
147 146 -.47461674 0 0 1 1 1 1
148 147 1.2050171 1 1 0 0 1 1
149 148 1.5156882 1 1 0 0 1 1
150 149 1.5499333 1 1 1 1 1 1
151 150 -.063660748 1 0 1 1 1 1
152 151 .27926692 0 0 1 1 1 1
153 152 1.800284 1 1 1 1 1 1
154 153 -2.4724929 0 0 0 0 1 1
155 154 1.4980674 1 1 1 1 1 1
156 155 1.0834401 1 0 1 0 1 1
157 156 -.73209035 0 1 0 0 1 1
158 157 .10514933 1 1 1 1 1 1
159 158 1.4848051 1 1 1 0 1 1
160 159 .48073712 0 1 0 1 1 1
161 160 -1.1459501 1 1 1 0 1 1
162 161 1.3261594 1 1 0 1 1 1
163 162 .45268533 0 1 0 1 1 1
164 163 -2.1466103 0 0 0 1 1 1
165 164 .036299877 1 0 1 1 1 1
166 165 1.132494 1 1 0 1 1 1
167 166 -.74459684 1 1 0 0 1 1
168 167 -1.3133749 0 0 1 0 1 1
169 168 .24529886 0 0 0 0 1 1
170 169 -.047662795 1 1 0 0 1 1
171 170 1.426119 1 1 1 1 1 1
172 171 -1.6673079 0 0 0 0 1 1
173 172 -.47215554 0 0 1 0 1 1
174 173 -1.1029931 0 1 0 0 1 1
175 174 .02064253 0 1 0 1 1 1
176 175 -.7602495 1 1 0 0 1 1
177 176 -1.225958 1 0 0 0 1 1
178 177 .062465422 1 1 1 0 1 1
179 178 -1.7623961 0 0 0 0 1 1
180 179 -.12828347 1 0 1 0 1 1
181 180 1.4514505 1 1 1 1 1 1
182 181 -.80989766 1 0 1 0 1 1
183 182 .18102278 1 1 1 1 1 1
184 183 -.89957333 1 1 0 1 1 1
185 184 1.1199794 1 1 0 1 1 1
186 185 -.45701504 1 0 1 1 1 1
187 186 .75216359 1 1 0 0 1 1
188 187 -1.0642035 1 1 1 0 1 1
189 188 -.297575 1 1 1 1 1 1
190 189 1.432634 1 1 1 1 1 1
191 190 .59969848 1 1 1 0 1 1
192 191 .38591364 0 0 0 1 1 1
193 192 -.17246659 0 1 0 0 1 1
194 193 .024799852 1 1 1 0 1 1
195 194 -.86773324 1 0 1 0 1 1
196 195 -1.3454363 0 0 0 0 1 1
197 196 .60606623 1 1 0 1 1 1
198 197 1.3981689 1 1 1 1 1 1
199 198 -.22852357 1 1 0 0 1 1
200 199 -1.6954113 1 0 0 0 1 1
201 200 -.48686084 0 1 1 0 1 1

70
Modules/simirt.ado
Unescape Escape View File

@ -112,12 +112,6 @@ if "`dim'"!="" {
local nbdiff:word count `diff' local nbdiff:word count `diff'
} }
} }
else if "`dim'"==""{ else if "`dim'"==""{
if "`diff'"==""&"`pcm'"=="" { if "`diff'"==""&"`pcm'"=="" {
di in red "{p 0 0 0}You must indicate the number of items to simulate with the {hi:dim}, the {hi:pcm} or the {hi:diff} option(s)." di in red "{p 0 0 0}You must indicate the number of items to simulate with the {hi:dim}, the {hi:pcm} or the {hi:diff} option(s)."
@ -151,8 +145,6 @@ if (`group'!=0|`deltagroup'!=0)&`dim'!=1 {
exit exit
} }
if "`prefix'"=="" { if "`prefix'"=="" {
local prefix item local prefix item
} }
@ -174,17 +166,6 @@ else {
local prefix`d' `prefix'`tmp' local prefix`d' `prefix'`tmp'
} }
} }
if "`covmatrix'"=="" { if "`covmatrix'"=="" {
tempname covmatrix2 tempname covmatrix2
local nbcov:word count `cov' local nbcov:word count `cov'
@ -204,15 +185,6 @@ if "`covmatrix'"=="" {
} }
matrix `covmatrix2'=(`cov') matrix `covmatrix2'=(`cov')
} }
else if `dim'==2 { else if `dim'==2 {
if `nbcov'!=3&`nbcov'>0 { if `nbcov'!=3&`nbcov'>0 {
di in red "You simulate two dimensions. You must indicate exactly 3 values in the {hi:cov} option (Variance of the first simulated latent trait, Variance of the second simulated latent trait, Covariance between the two simulated latent traits)." di in red "You simulate two dimensions. You must indicate exactly 3 values in the {hi:cov} option (Variance of the first simulated latent trait, Variance of the second simulated latent trait, Covariance between the two simulated latent traits)."
@ -244,13 +216,6 @@ if "`covmatrix'"=="" {
local covmatrix `covmatrix2' local covmatrix `covmatrix2'
} }
local nbmu:word count `mu' local nbmu:word count `mu'
if `nbmu'!=`dim'&`nbmu'!=0 { if `nbmu'!=`dim'&`nbmu'!=0 {
di in red "You must indicate as many values in the {hi:mu} option as the number of dimension(s) (`dim')" di in red "You must indicate as many values in the {hi:mu} option as the number of dimension(s) (`dim')"
@ -345,10 +310,6 @@ while $seed>2^31-1 {
qui set seed $seed qui set seed $seed
if "`typediff'"=="uniform" { if "`typediff'"=="uniform" {
if `nbdiff'==`=`dim'*2+1' { if `nbdiff'==`=`dim'*2+1' {
local min`d':word `=(`d'-1)*2+2' of `diff' local min`d':word `=(`d'-1)*2+2' of `diff'
@ -369,14 +330,6 @@ if "`typediff'"=="uniform" {
} }
} }
} }
else if "`typediff'"=="gauss" { else if "`typediff'"=="gauss" {
if `nbdiff'==`=`dim'*2+1' { if `nbdiff'==`=`dim'*2+1' {
forvalues d=1/`dim' { forvalues d=1/`dim' {
@ -404,12 +357,6 @@ else if "`typediff'"=="gauss" {
} }
} }
forvalues d=1/`dim' { forvalues d=1/`dim' {
if "`rsm`d''"!="" { if "`rsm`d''"!="" {
local nbrsm`d':word count `rsm`d'' local nbrsm`d':word count `rsm`d''
@ -452,21 +399,6 @@ forvalues i=1/`nbitems'{
} }
} }
if "`pcm'"==""|"`rsm1'"!="" { if "`pcm'"==""|"`rsm1'"!="" {
tempname pcm tempname pcm
if "`rsm1'"=="" { if "`rsm1'"=="" {
@ -582,7 +514,7 @@ local names
forvalues d=1/`dim' { forvalues d=1/`dim' {
qui gen x`d'=invnorm(uniform()) qui gen x`d'=invnorm(uniform())
qui compress qui compress
local names `names' lt`d' /*En R: names <- c(names,paste('lt',d)) */ local names `names' lt`d'
} }
matrix Chol=cholesky(corr(`covmatrix')) matrix Chol=cholesky(corr(`covmatrix'))

7
Scripts/R/generate_item_difficulties.R
Unescape Escape View File

@ -19,11 +19,13 @@ generate_diff_irt <- function(J=7,M=4) {
for (j in 1:J){ for (j in 1:J){
difficulties[j,1] = qnorm(j/(J+1)) difficulties[j,1] = qnorm(j/(J+1))
} }
if (M>2) {
for (j in 1:J){ for (j in 1:J){
for (m in 2:(M-1)){ for (m in 2:(M-1)){
difficulties[j,m]= difficulties[j,1]+(m-1)*2/(M-2) difficulties[j,m]= difficulties[j,1]+(m-1)*2/(M-2)
} }
} }
}
difficulties = difficulties-mean(difficulties) difficulties = difficulties-mean(difficulties)
return(difficulties) return(difficulties)
} }
@ -36,4 +38,9 @@ generate_diff_irt <- function(J=7,M=4) {
# GENERATE MATRIX FOR SIMULATION # GENERATE MATRIX FOR SIMULATION
################################################### ###################################################
generate_diff_irt(J=4,M=2)
generate_diff_irt(J=4,M=4)
generate_diff_irt(J=7,M=2)
generate_diff_irt(J=7,M=4)

1387
Scripts/Scenarios/NoDIF/scenarios_noDIF_baseline.do
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