Example 4: Selective item recoding

The test has 18 items, specified in file EXAM4.TXT. The response string starts in column 1. Person-id's start in column 41. Original codes are 0,1 in data file EXAM4DAT.TXT. Items 2, 3, and 4 are to be recoded as 1,0. All tables are to appear in report file EXAM4OUT.TXT, in a standardized form.

TITLE="An example of selective item recoding"    ; page title

NI=18                    ; 18 items

ITEM1=1                  ; item responses start in column 1

NAME1=41                 ; person-id starts in column 41

NAMLEN=9                 ; person-id has 9 characters: Richard M

PSELECT= ????????M       ; select M in position 9 of person name

NAMLMP=7                 ; 7 characters to appear on maps: "Richard"

CODES=01                 ; the observed response codes

CLFILE=*                 ; the code label list

0 Incorrect              ; the observed response codes

1 Correct

*                        ; end of list

IREFER=ABBBAAAAAAAAAAAAAA      ; can be letters or numbers

IVALUEA=01               ; A-type items keep original scoring (this line can be omitted)

IVALUEB=10               ; B-type items have reverse scoring

DATA=EXAM4DAT.TXT        ; name of data file

MRANGE=5                 ; plots and maps have half-range of 5 logits

LINELENGTH=0                 ; allow maximum line length

MAXPAGE=0                 ; no maximum page length

TABLES=1111111111111111111111111111111111      ; output all Tables to the Output file

&END

1-4

R2-3                     ; R reminds us item coding was reversed

R1-2-4

2-1-4

 .

4-1-3-4-2-1-4

END NAMES

The data file, EXAM4DAT.TXT, is

100011100000000000                      Richard M

100011111100000000                      Tracie  F

  .

100100000000000000                      Helen   F