Say you are creating some module or service, which is responsible for creating certain ratings, i.e. you're creating a rating service for e-books and you are trying to judge how romantic a book is. And for that service you create some test, where you use real books, which you have read and know how you would rate them yourself and you try to compare the results from your service to what you would give. And of course the purpose of this test would be to improve the quality of the service later, if it shows up that the service gives ratings which you don't agree with.

I mean in a way it would be a performance test, but performance test is already used in a technical context in testing and means how fast the system is able to process under a certain workload:

> 
> In software engineering, performance testing is in general, a testing
>  practice performed to determine how a system performs in terms of
>  responsiveness and stability under a particular workload
> 
> 
> 

Calling it a quality test, doesn't sound too right either? Usability test somewhat?

Is there already an official term for this kind of testing? If not, what would be the best way to call this kind of testing?