SAITEM= item numbers in SFILE= and SAFILE= (with one ISGROUPS=) = No

Rating-scale Structure-Threshold Files SFILE= and Structure-Threshold Anchor Files SAFILE= (Rating (or partial credit) scale step anchoring files) have the format:

 

 

Example 1: "Liking for Science" structure-threshold anchor file:

Standard format for the Rating Scale model:

ISGROUPS= ; no groupings specified

SAFILE=*

0 0 ; bottom category threshold is 0 as a place-holder

1 -1.8 ; Rasch-Andrich threshold from category 0 to category 1

2 1.8 ; Rasch-Andrich threshold from category 1 to category 2

*

 

Alternative format allowing an example item number to identify the grouping, say item 10

SAITEM=Yes

SAFILE=*

10 0  0 ; bottom category threshold is 0 as a place-holder

10 1 -1.8

10 2 1.8

*