@Fieldname= name for location in person or item label

@Fieldname= allows for user-defined names for locations with the person or item labels to be specified with the column selection rules.

@Fieldname = value

 

Field name: a user-specified name which can include letters and numbers, but not = signs. Field names are converted to capital letters, and must be referenced in full.  Fieldname is 1 to 9 characters, e.g., @X or @123456789 or @FIRSTNAME

 

Value:  a user-specified values which must accord with the column selection rules.

 

@ILABEL= is the length of the longest item label

@PLABEL= is the length of the longest person label

 

Example 1: The gender of persons is in column 14 of the person label. A DIF report on gender is wanted.

 @GENDER = 14 ; gender indicator in column 14 of the person label

 DIF = @GENDER ; DIF classification is by Gender column

 or

 DIF = @gender  ; lower case letters in field names are allowed

 but not

 DIF = @GEN  ; abbreviations of field names are not allowed

 TFILE=*

 30   ; produce the DIF Table

 *

 

 This can also be done by the pull-down menus

 Specification menu box: @GENDER = 14

 Output Tables menu: 30. Items: DIF

  Right-click on DIF selection box: @GENDER

  Click on OK box

 

Example: DIF for ethnicity in the pre- and post- treatment group:

 

In the person label, a column for pre-post code, say column 7

@PREPOST=7

a column for an ethnicity code, say column 3

@ETHNIC=3

DIF for pre-post and ethnicity:

DIF=@PREPOST+@ETHNIC

Produce Table 30

 

One way:  in your Winsteps control file:

TFILE=*

@PREPOST=7

@ETHNIC=3

DIF=@PREPOST+@ETHNIC

30

*