Trajectory of performance: The role of selection criteria on student achievement in a Bachelor of Oral Health programme.

Background: To determine whether discontinuing the Undergraduate Medicine and Health Sciences Admissions Test (UMAT) in 2011 for selection and changes to the South Australian Certificate of Education (SACE) requirements in 2012 when the new Australian Tertiary Admissions Rank (ATAR) was introduced impacted on students' accumulative level of achievement and performance in the Bachelor of Oral Health (BOH) programme.

Methods: Board of Examiner's course results for end of year performance were collected for BOH cohorts from 2006 to 2017 (n = 347). Overall performance and achievement level attained were calculated and formed the dependent variables, Performance and Achievement. Group-based trajectory modelling (GBTM) characterised trajectories of yearly academic achievement and the likelihood of each case belonging to the latent group classified as individual group membership. Chi-square (or Fischer's exact) tests were conducted on groups and selected independent variables, using SAS 9.4.

Results: A 2-group academic Performance trajectory was selected as Consistent (n = 290; 83.6%) and Inconsistent (n = 57; 16.4%), and Achievement level (credit number) trajectory as Low (n = 154; 44.4%) and High (n = 193; 55.6%). Statistically significant findings in relation to achievement level were found; female students, those who enrolled after UMAT was discontinued, students enrolled since SACE changes, and those who nominated BOH as their first career preference, were more likely to achieve higher grades than their counterparts.

Conclusion: Discontinuing the UMAT for selection and SACE changes have shown no adverse changes in students' level of achievement in the BOH programme, although enrolling in a course not their first preference was shown to affect performance level.