The process of comparing a student’s performance against his/her previous performance is known as:

Correct option is C

Ipsative assessment is the process where a student's current performance is compared against their previous performances. This type of assessment focuses on personal improvement and development, rather than comparing the student's performance to others or to a set standard. It is particularly useful in tracking the progress and growth of a student over time.
Information booster: This contrasts with other forms of assessment like diagnostic evaluation, which identifies students' strengths and weaknesses at a specific point in time, or summative assessment, which evaluates student learning at the end of an instructional unit by comparing it against some standard or benchmark.