Introversion is a basic personality style characterized by a preference for the inner life of the mind over the outer world of other people. One of the Big Five dimensions that define all personalities, introversion sits on a continuum at the opposite end of which is extroversion. Compared to extroverts, introverts enjoy subdued and solitary experiences.| Psychology Today
A bias is a tendency, inclination, or prejudice toward or against something or someone. Some biases are positive and helpful—like choosing to only eat foods that are considered healthy or staying away from someone who has knowingly caused harm. But biases are often based on stereotypes, rather than actual knowledge of an individual or circumstance. Whether positive or negative, such cognitive shortcuts can result in prejudgments that lead to rash decisions or discriminatory practices.| Psychology Today
Anxiety is both a mental and physical state of negative expectation. Mentally it is characterized by increased arousal and apprehension tortured into distressing worry, and physically by unpleasant activation of multiple body systems—all to facilitate response to an unknown danger, whether real or imagined.| Psychology Today
Shyness is a sense of awkwardness or apprehension that some people consistently feel when approaching or being approached by others. Shyness is a response to fear, and research suggests that although there is a neurobiology of shyness—the behavioral repertoire is orchestrated by a specific circuit of neurons in the brain—it is also strongly influenced by parenting practices and life experiences.| Psychology Today
Extroversion is a personality trait typically characterized by outgoingness, high energy, and/or talkativeness. In general, the term refers to a state of being where someone “recharges,” or draws energy, from being with other people; the opposite—drawing energy from being alone—is known as introversion.| Psychology Today
From eccentric and introverted to boisterous and bold, the human personality is a complex and colorful thing. Personality refers to a person's distinctive patterns of thinking, feeling, and behaving. It derives from a mix of innate dispositions and inclinations along with environmental factors and experiences. Although personality can change over a lifetime, one's core personality traits tend to remain relatively consistent during adulthood.| Psychology Today
"The grey drizzle of horror," author William Styron memorably called depression. The mood disorder may descend seemingly out of the blue, or it may come on the heels of a defeat or personal loss, producing persistent feelings of sadness, worthlessness, hopelessness, helplessness, pessimism, or guilt.| Psychology Today