If your system is interactive, steps to be anchored can be entered interactively by setting SANCHQ=Y before the &END line. If you specify this, you will be asked if you want to anchor any steps. If you respond "yes", it will ask if you want to read these anchored items from a file; if you answer "yes" it will ask for the file name and process that file in the same manner as if SAFILE= had been specified. If you answer "no", you will be asked to enter the step measures (found in Table 3).
If there is only one rating (or partial credit) scale, enter the category numbers for which the Rasch-Andrich thresholds are to be anchored, one at a time, along with their logit (or user-rescaled by USCALE=) Andrich threshold (structure measure) calibrations. Bypass categories without measures. Enter 0 where there is a measure of "NONE". When you are finished, enter -1 in place of the category number.
If there are several rating (or partial credit) scales, enter one of the item numbers for each rating (or partial credit) scale, then the Andrich thresholds corresponding to its categories. Repeat this for each category of an item for each rating (or partial credit) scale. Enter 0 where there is a Andrich Threshold for a category of "NONE". Entering 0 as the item number completes anchoring.
Example 1: You are doing a number of analyses, anchoring the common rating (or partial credit) scale to different values each time. You want to enter the numbers at your PC:
SANCHQ=Y
You want to anchor items 4 and 8.
Winsteps asks you:
DO YOU WANT TO ANCHOR ANY STRUCTURES? respond YES(Enter)
DO YOU WISH TO READ THE ANCHORED STRUCTURES FROM A FILE?
respond NO(Enter)
INPUT STRUCTURE TO ANCHOR (-1 TO END):
respond 2(Enter) (the first category Rasch-Andrich threshold to be anchored)
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold:
respond 0(Enter) (the first anchor value)
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 4(Enter)
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold:-1.5(Enter)
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 6(Enter)
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold:1.5(Enter)
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): -1(Enter) (to end anchoring)
Example 2: You wish to enter the Andrich Thresholds for several rating scales, each comprising a grouping of items: SANCHQ=Y
Winsteps asks you:
DO YOU WANT TO ANCHOR ANY Rasch-Andrich thresholdS? YES(Enter)
DO YOU WANT TO READ THE ANCHORED Rasch-Andrich thresholdS FROM A FILE? NO
Item 1 represents the first grouping of items, sharing a common rating scale:
INPUT AN ITEM, REPRESENTING A GROUPING (0 TO END): 1
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 0 bottom category
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold: 0 "NONE"
INPUT AN ITEM, REPRESENTING A GROUPING (0 TO END): 1
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 1
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold: -0.5
INPUT AN ITEM, REPRESENTING A GROUPING (0 TO END): 1
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 2
INPUT VALUE AT WHICH TO ANCHOR Rasch-Andrich threshold: 0.5
Item 8 represents the second grouping of items, sharing a common rating scale:
INPUT AN ITEM, REPRESENTING A GROUPING (0 TO END): 8
INPUT Rasch-Andrich threshold TO ANCHOR (-1 TO END): 0 bottom category
When all are anchored, enter 0 to end:
INPUT AN ITEM, REPRESENTING A GROUPING (0 TO END): 0
