IVALUEx= recoding of data (with IREFER=)

Responses are revalued according to the matching codes in IREFER= (or ISGROUPS= if IREFER= is omitted). Items in IREFER= not referenced by an IVALUEx= are not recoded.

IVALUEa= is the same as IVALUEA=

The recoded values in IVALUEx= line up vertically with the response codes in CODES=, if a data value does not match any value in CODES= it will be treated as missing.

Valid one-character IVALUE= codes include: !#$%&-./123456789<>@ABCDEFGHIJKLMNOPQRSTUVWXYZ^_|~

A-Z are the same as a-z.

Characters with ASCII codes from 129-255 can also be used, but display peculiarly: ÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâã etc.

When XWIDE=2 or more, then

either        (a) Use one character per XWIDE and blanks,

               NI=8

               XWIDE=2

               IREFER=' A B C D D C B A'

or        (b) Use one character per item with no blanks

               NI=8

               XWIDE=2

               RESCORE='ABCDDCBA'

Layout is:

       NI = 17

       IREFER = AABCADBCDEEDEAABC  ; the recoding type designators for the 17 items

       ;  see the vertical line up here

       CODES   = 0123456 ; valid codes across all items

       IVALUEA = 012**** ; recodes for Grouping A

       IVALUEB = *1224** ; recodes for Grouping B: "2" and "3" recoded to "2"

       IVALUEC = *122226 ; 1-2-6 acts as 1-2-3 because STKEEP=NO

       IVALUED = 012333*

       IVALUEE = 00123**

       STKEEP=NO                ; missing intermediate codes are squeezed out

Example 1:        Items identified by Y and Z in IREFER= are to be recoded.

Y-type items are 1-3, 7-8. Z-type items are 4-6, 9-10. All items have their own rating (or partial credit) scales,

       NI = 10

       IREFER = YYYZZZYYZZ        ; items identified by type: item 1 is Y, item 4 is Z etc.

       CODES  = ABCD        ; original codes in the data

       IVALUEY= 1234        ; for Y-type items, this converts A to 1, B to 2, C to 3, D to 4

       IVALUEZ= 4321        ; for Z-type items, this converts A to 4, B to 3, C to 2, D to 1

       ISGROUPS=0        ; allow each item to have its own rating (or partial credit) scale structure

Example 2:        Items identified by 1, 2, 3 in ISGROUPS= are to be recoded and given there own rating (or partial credit) scales

Y-type items are 1-3, 7-8. Z-type items are 4-6, 9-10.

               NI = 10

               ISGROUPS = YYYZZZYYZZ

               CODES= ABCD        ; original codes in the data

               IVALUEY= 1234

               IVALUEZ= 4321

or

               NI = 10

               ISGROUPS = YYYZZZYYZZ

               IREFER = YYYZZZYYZZ

               CODES= ABCD        ; original codes in the data

               IVALUEY= 1234

               IVALUEZ= 4321

Example 3:        All items are to be recoded the same way.

       NI = 100                        100 ITEMS

       IREFER=*

       1-100        X                        FOR ALL 100 ITEMS, reference is X

       *

       Codes        = 12345                rescore 12345

       IVALUEX = 12223                into 12223