A mindset (also known as mentality especially when considered as biased and closed-minded) refers to an established set of attitudes of a person or group concerning culture, values, philosophy, frame of reference, outlook, or disposition. Person A is said to have a theory of mind (ToM) about person B, relating mindset research to ToM. This may also develop from a person's worldview or beliefs about the meaning of life.
A mindset could create an incentive to adopt (or accept) previous behaviors, choices, or tools, sometimes known as cognitive inertia or groupthink. When a prevailing mindset is limiting or inappropriate, it may be difficult to counteract its grip on analysis and decision-making.