It has been discovered that students' submissions to Turnitin are not easily read by text-to-speech assistive technology. This was discovered this through our licensing of the Google Chrome extension called Read&Write for Google Chrome.
If you would like to use text-to-speech assistive technology with Turnitin's Feedback Studio to read students' submissions you will have to change your Turnitin Feedback Studio screen to "Text-Only" before it can be read by text to speech assistive technology.