Main purpose of assessment is to obtain information for the improvement of teaching and learning.  If assessment is to be a positive force in education, it must be implemen â¦ ted properly.
Albert S. Osborn (1858 - 1946) is a pioneer in forensic science that was involved and developed all of his time to the study of evidence in questioned documents. Question documents involves with handwriting. So, the job of the experts is to find out how, when, and by whom certain documents were prepared.
Informant connotes qualitative research and respondent connotes quantitative research. Type: key informant (also called gatekeeper) â (noun) A primary source for an ethnographic researcher that often enthusiastically shares information and facilitates access to other people. Also called: participant. source.