 Introversion is the state of being predominantly interested in one's own mental self. Introverts are typically perceived as more reserved or reflective. Some popular psychologists have characterized introverts as people whose energy tends to expand through reflection and dwindle during interaction. This is similar to Yu-Geng's view, although he focused on mental energy rather than physical energy. Few modern conceptions make this distinction. Introverts often take pleasure in solitary activities such as reading, writing, using computers, hiking, or fishing. The archetypal artist, writer, sculptor, scientist, engineer, composer, and inventor are all highly introverted. An introvert is likely to enjoy time spent alone and find less reward in time spent with large groups of people, though they may enjoy interactions with close friends. Trust is usually an issue of significance, a virtue of utmost importance to introverts is choosing a worthy companion. They prefer to concentrate on a single activity at a time and like to observe situations before they participate, especially observed in developing children and adolescents. They are more analytical before speaking. Introverts are easily overwhelmed by too much stimulation from social gatherings and engagement, introversion having even been defined by some in terms of a preference for a quiet, more minimally stimulating external environment. Mistaking introversion for shyness is a common error. Introversion is a preference, while shyness stems from distress. Adults prefer solitary to social activities, but do not necessarily fear social encounters like shy people do. Susan Cain argues that modern Western culture misjudges the capabilities of introverted people, leading to a waste of talent, energy and happiness. Cain describes how society is biased against introverts, and that, with people being taught from childhood that to be sociable is to be happy, introversion is now considered somewhere between a disappointment and pathology. In contrast, Cain says that introversion is not a second-class trait but that both introverts and extroverts enrich society, with examples including the introverts J.K. Rowling, Havat C.I., Isaac Newton, Albert Einstein, Mahatma Gandhi, Dr. Seuss, W.B. Yitz, Steven Spielberg and Larry Page.