How can you introduce bias in ABCD e.g math tests? >think including attributes such as grit, leadership, and talent across many areas such as writing, the vari

How can you introduce bias in ABCD e.g math tests? >think including attributes such as grit, leadership, and talent across many areas such as writing, the various arts and many other fields is useful. How do you measure leadership? And prevent bias/preference from the examiner?