Example 3: Item recoding and item deletion |
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The test has 25 items, specified in EXAM3.TXT. The item response string starts in column 12. Person-id's start in column 1 (the standard value). Original item codes are "0", "1", "2" and "X". All items are to be recoded and the original-to-new-code assignments will be 0 0, 1 2, 2 1 and X 3. Items 5, 8, and 20 through 25 are to be deleted from the analysis, and are specified in the control. The misfit criterion for person or item behavior is 3.0. Tables 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19, 20 and 21 are to appear in your report output file EXAM3OUT.TXT. Sequence numbers are used as item names. Data are in file EXAM3DAT.TXT.
; This file is EXAM3.TXT
TITLE="A test with 25 recoded items" ; informative title
NI=25 ; 25 items
ITEM1=12 ; item responses start in column 12
CODES =012X ; valid codes
NEWSCORE=0213 ; corresponding response score
RESCORE=2 ; specifies rescore all items
TABLES=1111111110101010101110 ; selected tables to go in output file
FITP=3.0 ; person misfit cut-off for reporting
FITI=3.0 ; item misfit cut-off for reporting
DATA=EXAM3DAT.TXT ; name of data file
IDFILE=* ; list of items to delete: or use IDFILE=file name
5 ; delete item 5
8 ; delete item 8
20-25 ; delete items 20 through 25
* ; end of list
INUMB=Y ; use item sequence numbers as names
&END ; end of control specifications
The data is in file EXAM3DAT.TXT
101F20FJDP 21XX2XXXXX111X1200001X2X
102M20PFNP X2210122211222211222120X2
.
175F FBDP 1X00X00000200012X02220100
176F23FEDP 21121022012002121 2202000 person id's contain demographic information