[LON-CAPA-cvs] cvs: loncom /interface lonstatistics.pm
minaeibi
lon-capa-cvs@mail.lon-capa.org
Wed, 06 Mar 2002 23:56:13 -0000
minaeibi Wed Mar 6 18:56:13 2002 EDT
Modified files:
/loncom/interface lonstatistics.pm
Log:
Added 2 criteria for discimination Factor
Index: loncom/interface/lonstatistics.pm
diff -u loncom/interface/lonstatistics.pm:1.7 loncom/interface/lonstatistics.pm:1.8
--- loncom/interface/lonstatistics.pm:1.7 Wed Mar 6 13:42:01 2002
+++ loncom/interface/lonstatistics.pm Wed Mar 6 18:56:13 2002
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# (Publication Handler
#
-# $Id: lonstatistics.pm,v 1.7 2002/03/06 18:42:01 minaeibi Exp $
+# $Id: lonstatistics.pm,v 1.8 2002/03/06 23:56:13 minaeibi Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -67,7 +67,6 @@
my $OpSel2;
my $OpSelDis1;
my $OpSelDis2;
-my $CurDis=0;
my $OpSel3;
my $OpSel4;
my $GData;
@@ -79,8 +78,7 @@
my $P_Order;
my %Header = (0,"Homework Sets Order",1,"#Stdnts",2,"Tries",3,"Mod",
4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff",
- 9,"S.D.",10,"Skew.",
- 11,"D.F.",12,"U.A.",13,"L.A.",14,"U.R.",15,"L.R.");
+ 9,"S.D.",10,"Skew.",11,"D.F.1st",12,"D.F.2nd");
#------- Processing upperlist and lowerlist according to each problem
sub ProcessDisc {
@@ -91,7 +89,8 @@
my @Dis;
my $Slvd=0;
my $tmp;
- my $Sum=0;
+ my $Sum1=0;
+ my $Sum2=0;
my $nIdx=0;
my $nStud=0;
my %Proc;
@@ -103,14 +102,16 @@
do {
$nIdx++;
$nStud++;
- $Sum += $Dis[$CurDis];
+ $Sum1 += $Dis[0];
+ $Sum2 += $Dis[1];
($Prb,$tmp)=split(/\=/,$List[$nIdx]);
@Dis=split(/\+/,$tmp);
} while ( $Prb eq $Temp && $nIdx < $Count );
- $Proc{$Temp}=$Sum.':'.$nStud;
- $Proc{$Temp}=($Sum/$nStud).':'.$nStud;
+# $Proc{$Temp}=($Sum1/$nStud).':'.$nStud;
+ $Proc{$Temp}=($Sum1/$nStud).':'.($Sum2/$nStud);
# $r->print("$nIdx) $Temp --> ($nStud) $Proc{$Temp} <br>");
- $Sum=0;
+ $Sum1=0;
+ $Sum2=0;
$nStud=0;
}
return %Proc;
@@ -348,27 +349,21 @@
'<b> #yes </b>: Number of students solved the problem by override.<br>'.
'<b> %Wrng </b>: Percentage of students tried to solve the problem but'.
' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
-# ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'.
- '<b> DoDiff </b>: Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'.
+# ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'. Kashy formula
+ '<b> DoDiff </b>: Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'. #Gerd formula
'<b> S.D. </b> : Standard Deviation of the tries.'.
'[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
' where Xi denotes every student\'s tries ]<br>'.
'<b> Skew. </b>: Skewness of the students tries.'.
- ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
-
- '<b> Dis.F. </b>: Discrimination Factor. [ Sum of Partial Credits'.
- ' Awarded / Total Number of Tries in %27 upper and lower students]<br>'.
- '<b> U.A. </b>: Upper %27 Award<br>'.
- '<b> L.A. </b>: Lower %27 Award<br>'.
- '<b> U.R. </b>: Upper %27 Records<br>'.
- '<b> L.R. </b>: Lower %27 Records'.
-
-# "<br>The <b>Upper 27%</b> has <b>$UpCnt</b> records.".
-# " The <b>Lower 27%</b> has <b>$UpCnt</b> records <br>".
-# "The Criterion of sorting the students: ".
-# "<b>( Sum of Partial Credits Awarded / ".
-# "Total Number of Tries )</b>".
-
+ ' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
+ '<b> Dis.F. </b>: Discrimination Factor: A Standard for '.
+ 'evaluating the problem according to a Criterion<br>'.
+ '<b> [Applied Criterion in %27 Upper Students - '.
+ 'Applied the same Criterion in %27 Lower Students]</b><br>'.
+ '<b> 1st </b>Criterion for Sorting the Students: '.
+ 'Sum of Partial Credit Awarded / Total Number of Tries<br>'.
+ '<b> 2nd </b>Criterion for Sorting the Students: '.
+ 'Total number of Correct Answers / Total Number of Tries'.
'</pre>';
$r->print($Ptr);
@@ -811,14 +806,12 @@
}
#--------------------- Compute the Discrimination Factors
- my ($UpD,$UpNo)=split(/\:/,$DisUp{$lpr[$i]});
- my ($LwD,$LwNo)=split(/\:/,$DisLow{$lpr[$i]});
- $UpNo = ($UpNo) ? $UpNo : 0;
- $LwNo = ($LwNo) ? $LwNo : 0;
- my $U_D = sprintf("%.2f", $UpD);
- my $L_D = sprintf("%.2f", $LwD);
- my $DisFac = $UpD - $LwD;
- my $_Dis = sprintf("%.2f", $DisFac);
+ my ($Up1,$Up2)=split(/\:/,$DisUp{$lpr[$i]});
+ my ($Lw1,$Lw2)=split(/\:/,$DisLow{$lpr[$i]});
+ my $Dis1 = $Up1 - $Lw1;
+ my $Dis2 = $Up2 - $Lw2;
+ my $_D1 = sprintf("%.2f", $Dis1);
+ my $_D2 = sprintf("%.2f", $Dis2);
#----------------- Some restition in presenting the float numbers
my $Avg = sprintf( "%.2f", $Average );
@@ -829,8 +822,7 @@
my $join = $PrOrd.':'.$Temp.':'.$StdNo.':'.
$TotalTries.':'.$MxTries.':'.$Avg.':'.
$YES.':'.$Override.':'.$Wrng.':'.$DoD.':'.
- $SD.':'.$Sk.':'.$_Dis.':'.$U_D.':'.
- $L_D.':'.$UpNo.':'.$LwNo.':'.$Prob;
+ $SD.':'.$Sk.':'.$_D1.':'.$_D2.':'.$Prob;
$CachData{($p_count-1)}=$join;
$urlres=~/^(\w+)\/(\w+)/;
@@ -899,11 +891,10 @@
sub TableRow {
my ($Str,$Idx,$RealIdx)=@_;
my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,
- $Override,$Wrng,$DoD,$SD,$Sk,$_Dis,$U_D,$L_D,$UpNo,$LwNo,
- $Prob)=split(/\:/,$Str);
+ $Override,$Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$Prob)=split(/\:/,$Str);
$r->print( "\n".'<tr>'.
"\n".'<td>'.($RealIdx+1).'</td>'.
- "\n".'<td bgcolor="#FFFFFF">'.$Temp.'</td>'.
+ "\n".'<td>'.$Temp.'</td>'.
"\n".'<td bgcolor="#EEFFCC"> '.$StdNo.'</td>'.
"\n".'<td bgcolor="#EEFFCC">'.$TotalTries.'</td>'.
"\n".'<td bgcolor="#EEFFCC">'.$MxTries.'</td>'.
@@ -914,11 +905,8 @@
"\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
"\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
"\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
- "\n".'<td bgcolor="#FFDDCC"> '.$_Dis.'</td>'.
- "\n".'<td bgcolor="#FFFFDD"> '.$U_D.'</td>'.
- "\n".'<td bgcolor="#FFFFDD"> '.$L_D.'</td>'.
- "\n".'<td bgcolor="#FFFFDD"> '.$UpNo.'</td>'.
- "\n".'<td bgcolor="#FFFFDD"> '.$LwNo.'</td>'.
+ "\n".'<td bgcolor="#FFDDFF"> '.$_D1.'</td>'.
+ "\n".'<td bgcolor="#FFDDFF"> '.$_D2.'</td>'.
"\n".'</tr>' );
$GraphDat{$RealIdx}=$DoD.':'.$Wrng;
}
@@ -1148,19 +1136,10 @@
}
sub GetStatus {
-
-# $OpSelDis1='';
-# $OpSelDis2='';
$OpSel1='';
$OpSel2='';
$OpSel3='';
$OpSel4='';
-
-# if ( $ENV{'form.DisType'} eq 'Total Number of Correct Answers' ) {
-# $OpSelDis1='selected';
-# $CurDis=0;
-# }
-# else { $OpSel2 = 'selected'; $CurDis = 1;}
if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
else { $OpSel1 = 'selected'; }