I want to have more insight on the issues raised. The feedback will pave the way to see new perspectives and current understanding about the issue that can substantiate the field.
In my opinion, there is interdependence between these two aspects since motivation can be the motor of education and the outcomes of education can indeed motivate students to continue learning.
When thinking about feedback, continuous feedback help students detect their weakness and improve. Besides, when there is adequate feedback, students feel comfortable and perform in a more natural way because they assume mistakes are just natural and teachers are there to help them, not to judge them.
Maybe this paper on rubrics is useful for you:
Preprint Use of assessment rubrics: Do the students care about them? ...
Or maybe this one, on feedback:
Article Percepción estudiantil de la importancia de la retroalimentación