What measurements are used to determine a persons level of impairment?

To determine a person's level of impairment, several measurements can be used, including clinical assessments (such as the DSM-5 for mental health), standardized tests (like the Mini-Mental State Examination for cognitive function), and functional assessments (which evaluate daily living skills). Additionally, self-reported questionnaires and observational assessments may be employed to gauge the individual's ability to perform tasks and their overall quality of life. These tools help in creating a comprehensive understanding of the person's capabilities and limitations.