9. 模 数据拟
//Refer to Dr. Wen Jianbing's dissertation
function LOGISTIC_MODEL(a,b,c,theta){
return c+(1-c)/(1+Math.exp(-1.7*a*(theta-b))) ;
}
function PRINT_RESULT(result){
if(result>Math.random()){
document.write("1");
}
else document.write("0");
}
function GENERATE_DATA(){
for (i=0;i<500;i++){
PRINT_SUBJECT(i);
for (j=0;j<30;j++){
result = LOGISTIC_MODEL(item[j][0],item[j][1],item[j][2],subject[i]);
PRINT_RESULT(result);
}
document.write("<br />");
}
}
10. 价一个 目的 劣(信息函数)评 试题项 优
信息函数:
判断 准一:标
判断 准二:标
“ 在 制 程中根据前者来 目可能更方便一点,而测验编 过 选择项
要 地比 目的 劣 可能 是要用后者。”笼统 较项 优 则 还
“ 最佳 分权”评
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以 ui 第记 i 个 目的得分(答 得项 对 1 分,答 不得分):错
以 作 目为项 i 得分的加权数所 的信息函数是最大对应
的
参数的最佳 分权:单 评
双参数的最佳 分权:评
三参数的最佳 分权:评
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12. Phase 1: INPUT
The input routine reads formatted data records.
Data for each observation consist of
Item responses of individual examinees comprise one character for
each of n items.
The answer key, not-presented, and omit codes are read in exactly
the same format as the observations.
For aggregate-level data, the "responses" consist of number of
attempts and number correct for each item.
If data are for the aggregate-level model, vectors of numbers of
attempts and correct responses to the items are read in decimal
format.
Subject ID [ Form Number ] [ Group Number ] Item Response Data
18. 其他 目反 模型项 应
Nominal Categorical Model ( Bock , 1972 )
分部反 模型( 目 度不一定应 项 难 单
,调 Masters , 1982 )
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