<P> Due to birth - year overlap between definitions of Generation X and millennials, and the tentative nature of generations, some individuals born in the late 1970s and early 1980s see themselves as being "between" the two generations . Names given to those born in the Generation X and Millennial cusp years include Xennials, Generation Catalano, and the Oregon Trail Generation . </P> <P> Authors William Strauss and Neil Howe believe that each generation has common characteristics that give it a specific character with four basic generational archetypes, repeating in a cycle . According to their hypothesis, they predicted millennials will become more like the "civic - minded" G.I. Generation with a strong sense of community both local and global . Strauss and Howe ascribe seven basic traits to the Millennial cohort: special, sheltered, confident, team - oriented, conventional, pressured, and achieving . Arthur E. Levine, author of When Hope and Fear Collide: A Portrait of Today's College Student describes these generational images as "stereotypes". </P> <P> Strauss and Howe's research has been influential, but it also has critics . Psychologist Jean Twenge says Strauss and Howe's assertions are overly - deterministic, non-falsifiable, and unsupported by rigorous evidence . Twenge, the author of the 2006 book Generation Me, considers millennials, along with younger members of Generation X, to be part of what she calls "Generation Me". Twenge attributes millennials with the traits of confidence and tolerance, but also describes a sense of entitlement and narcissism, based on personality surveys showing increased narcissism among millennials compared to preceding generations when they were teens and in their twenties . She questions the predictions of Strauss and Howe that this generation will turn out civic - minded . A 2016 study by SYZYGY a digital service agency, found millennials in the U.S. continue to exhibit elevated scores on the Narcissistic Personality Inventory as they age, finding millennials exhibited 16% more narcissism than older adults, with males scoring higher on average than females . The study examined two types of narcissism: grandiose narcissism, described as "the narcissism of extraverts, characterized by attention - seeking behavior, power and dominance", and vulnerable narcissism, described as "the narcissism of introverts, characterized by an acute sense of self - entitlement and defensiveness ." </P> <P> The University of Michigan's "Monitoring the Future" study of high school seniors (conducted continually since 1975) and the American Freshman survey, conducted by UCLA's Higher Education Research Institute of new college students since 1966, showed an increase in the proportion of students who consider wealth a very important attribute, from 45% for Baby Boomers (surveyed between 1967 and 1985) to 70% for Gen Xers, and 75% for millennials . The percentage who said it was important to keep abreast of political affairs fell, from 50% for Baby Boomers to 39% for Gen Xers, and 35% for millennials . The notion of "developing a meaningful philosophy of life" decreased the most across generations, from 73% for Boomers to 45% for millennials . The willingness to be involved in an environmental cleanup program dropped from 33% for Baby Boomers to 21% for millennials . Millennials show a willingness to vote more than previous generations . With voter rates being just below 50% for the last four presidential cycles, they have already surpassed Gen Xers of the same age who were at just 36% . </P>

When was someone born if they are 20