How the Scaled Awards are Calculated and Used to Determine the ATAR
- Step 1
As has previously been the case, using the subject algorithms that may be found in the subject syllabus statements section of this web-site, allocate subject awards to students.
- Step 2
Carry out a Rasch Analysis of the results for all pre-tertiary subjects to identify any anomalous cases. Temporarily remove these cases from the analysis so that they do not distort the results. Anomalous cases may occur if a subject does not 'fit' the Rasch model, ie it is not measuring the same underlying characteristic of "general academic ability". This happens only in a small number of cases. Rasch Analysis identifies these for treatment by a slightly different method.
- Step 3
Carry out a Rasch Analysis on the remaining results and determine the award cut-off points for each subject (difficulty values).
- Step 4
Adjust the subject difficulty values to be on a scale that is similar to the old 20-point scale by making the average CA equal to 7.0 and average EA equal to 21.0.
- Step 5
Apply these results to all of the students who undertook any subjects that were not excluded above.
- Step 6
Reintroduce the small number of subjects that had been excluded above by determining their award cut-off points by statistically comparing student performances in other subjects as determined above.
- Step 7
Insert the award cut-off or difficulty values obtained in Step 5 and readjust (if necessary) so that the average CA and EA requirements are retained at 7.0 and 21.0 respectively.
- Step 8
Produce the required table of award sub-scores (between cut-off points).
- Step 9
Apply the sub-score values to students to determine the subject contributions to the TE Score.
- Step 10
Aggregate the best 5 scores (including at least 3 from Year 12) to determine the TE Score
- Step 11
Use the TE Score to calculate the Australian Tertiary Admission Rank (ATAR).
The steps above are overseen by a special Scaling Committee to ensure that the process is applied appropriately.
If you have a query about what subjects can be counted towards your ATAR please send your query to the following email address: ATAR.firstname.lastname@example.org