IMPORTING ITEM AND PERSON ESTIMATES
Can Item and Person Estimates be Imported into
RUMM2030 allows for importing of item estimates
through its anchor items routine and of person estimates through the creation of
a New Project. These procedures are
related as follows:
- Create a template of
the item set either from scratch or by using RUMM2030. The latter involves selecting the
items required from the listing as displayed in Figure 2.2 or Figure 2.3
of the "Displaying the RUMM2030 Analysis" Manual and pressing
the Anchor Items button.
- Next, create a New
project using the specifications of the item set involved in the previous
step. Here you import the persons directly from the data file containing
the person records and end up at the Analysis Control Form ready to
create an Analysis Name. See
Chapters 2 to 4 of the "Getting Started" Manual.
- Create a new Analysis
Name — at this stage it is the first one, of course – making sure to
select the special anchor option. Where requested, import the set of item
estimates in the Template File which was prepared earlier.
- Accept the set of
anchor items in total and return to the Analysis Control Form.
- From here, run the
analysis [using the normal RUMM2030 procedures described in Chapter 5 of
the "Getting Started" Manual] and then display your results [as
in the "Displaying the RUMM2030 Analysis" Manual].
NOTE: The one thing you must be very careful of
when importing items and persons is to have them checked in terms of the strict
requirements imposed by the measurement model. RUMM2030 does all this routinely
when the normal procedures are invoked; the anchor items facility is a good way
of achieving this outcome. The persons must also be checked thoroughly before
conducting a Rasch analysis and
RUMM2030 does this in the editing and sufficient
statistics stages which occur prior to the estimation routines. By using the
sequence outlined above all of the necessary checks and balances are engaged.
The procedure is really straight forward and does not involve much effort