Table 22.3 Guttman Scalogram of Original Codes |
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A A |
The observations are printed in order of person and item measures, with most able persons listed first, the easiest items printed on the left. This scalogram shows the original codes in the data file. Here is the Scalogram for Example 5, a computer-adaptive, multiple-choice test.
GUTTMAN SCALOGRAM OF ORIGINAL RESPONSES:
STUDENT |TOPIC
| 11 3 11 1 3212232212132425654421434145625 36555366356465464633654
|640215038189677748390992315641640517264579268221076889430372139553458
|---------------------------------------------------------------------
3 + d b c db d c b cd S STA
6 + c b c d d c cd S CHU
27 + c c c c cbb a dd c b dd S ERI
4 + c b a d cb c dd d b d dc S CHE
9 + d c a a cbc c ba b dca c db dc bbdbb c S MEL
25 + c b d c bc a a d a c dba d cbccbd c S DAN
24 + a d ac b c d c b a a AP SAR
12 + c b c c b b b b a cb cc c A ALL
28 + c c a bcc b c acc d b bc b c bdcb d IH GRE
21 + b c b a c b a bc bb ab a db bbd cc b b AP MIL
11 + a d c b cc cbad d ca c d ca ba b ac bac bc d c cc S CHR
17 + d d c c acac cac b c a a b c c bc b ac ac IH FRA
7 + d c d ccaaac d bcd ca b cb c b a a a a ab b bb ac IH JAN
1 + c c ab ca dc b a a c a c IM CAT
20 + bd b c b cad cd a bac b a b c b IL JAM
22 + d a d c b d cdabcc bbc cbdb a a dbac c dc d a IM BAR
30 + d a a cab cdd d d da c d c c db IL HOL
14 + b d c db caa caa da c dcd b c a cd d c c d b IL TAK
23 + d cab dcaa cadbbbba a c a db c b a c c ab c IL MEI
26 + d a cc b ac cdd b a d db a d b d d cb c IL MIT
15 + d d a a caba dcbddc c d b b a c bb NH MAR
13 + d d d c bac dc bd d dcd d a d d c b b NH KEL
29 +b dbd bdcabd baaacbd c d c ab a dd d c b c NH RIC
8 +bbdadbd abaa acbcbccacbcadab c d cdab a d a a c c cb IL ROB
16 +b da b bdccbbbcccbadaabba ccd c ac bd a a b NM HEL
18 +b a a d bca bc a cccc a db c a a d d NH JOE
10 +b badbdbcccadacbababcda cba a a acd a d a b NM JON
19 +bbdad dacbdb cabdbc c ad d ab b c a b NM THE
2 +bbda a d aaaa c c a cbd ab a d c NM KAT
5 + aad a ab a b a NL SMI
|---------------------------------------------------------------------
| 11 3 11 1 3212232212132425654421434145625 36555366356465464633654
|640215038189677748390992315641640517264579268221076889430372139553458