Cornell University law school: Implicit Bias is subconscious and unintentional involving attitudes and stereotypes that can influence how human beings related to their environment. The person does not have direct control or conscious understanding of their perceptions and motivations.
Dictionary.com: Implicit bias is the tendency to process information based on unconscious associations and feelings, even when these are contrary to one’s conscious feelings or declared beliefs.
Kirwan Institute at Ohio State University: Implicit bias involves unconsciously absorbed attitudes or stereotypes that affect a person’s understanding, actions, and decisions. They are activated involuntarily, without an individual’s awareness or intentional control. Therefore, they are not accessible through introspection.
My brain’s opinion is that implicit biases may be identified through analysis of the actions and behaviors that the person exhibits spontaneously.