In my opinion... Devices that offer Altered Auditory Feedback (AAF), Delayed Auditory Feedback (DAF), and Frequency Altered Feedback (FAF) can increase fluent speech. However, studies show the improved fluency is only slightly above the margin of statistical significance. That basically means that the improvement can be measured, but it's not a dramatic improvement. Historically, SpeechEasy has not consented to independent studies. They absolutely list studies to show AAF/DAF/FAF have an impact, but do not actively participate in having the devices evaluated in peer-reviewed research journals. I doubt they are trying to hide, it's just that they have a business and want no part in a study that finds their $$ product is marginally better than a placebo. I'm not familiar with Australia specifically, but most colleges and universities adhere to anti-discriminatory laws and policies, allowing individuals with documented medical limitations to receive accommodations on standardized tests. I'd put my effort into that rather than a AAF/DAF/FAF device.