A negative change for a student could be moving schools, meaning you lose your friends and have to adapt to a new daily routine. Another could be getting into an AP class, which could add stress in your life.
As a student, you encounter a lot of stress at study. Going for classes, work load of assignments, and lots more. But having no choice than to do those things make it look like it is a norm, so you acclamatise to the conditions of the stress. More so as an employee jumping from one place to another and multi-tasking simultaneously may be stressful. But you have to endure the stress to make ends meet.
I think one negative change for both student and employee is getting used to stress.
The major difference between retrograde amnesia and anterograde amnesia is the following: Retrograde amnesia is the inability to recall past memories while anterograde amnesia is the inability to create new memories.