A person displaying a lack of interest is an indicator of which disorder?

A person displaying a lack of interest is primarily associated with Schizophrenia, which can manifest in various symptoms, including apathy or a diminished interest in life activities. This lack of engagement can be a significant component of the disorder, often referred to as "negative symptoms," which can hinder an individual's ability to function in daily life.

Schizophrenia is characterized by a range of cognitive, behavioral, and emotional dysfunctions, and individuals may show a disconnection from reality, disorganized thinking, and social withdrawal. The lack of interest can be interpreted as a lack of motivation or emotional response to circumstances that would typically prompt engagement or enthusiasm.

In contrast, while Attention Deficit Disorder can reflect issues with focus and attention, it doesn't necessarily equate to a general lack of interest across many areas. Bipolar Disorder includes episodes of extreme mood swings, which may involve periods of high energy and engagement, making a persistent lack of interest less characteristic. Borderline Personality Disorder involves intense emotions and instability in relationships rather than a pervasive lack of interest.

Thus, the association between a consistent lack of interest and Schizophrenia confirms it as the correct answer.