Researchers use a person's reluctance to get too close to a person from another group as a measure of discrimination. this is known as

I believe the answer is: Social Distance

Social distance refers to the gap of situation or condition that must be experienced by each classes of social groups within a society.
This could measure things such as economic wellness, discriminatory attitude from establishment, health, life threats, etc.

Iam confused by your question as their are only 27 grievances listed in the declaration of independence by thomas jefferson against the crown. i would like to you out so maybe reply with a more clearer question? or maybe say there isn’t one?