Final answer:
Erickson's concept of a person in midlife who is self-absorbed and lacks interest in helping younger people is called Stagnation.
Step-by-step explanation:
Erik Erikson's concept of a person in midlife who is self-absorbed and lacks interest in helping younger generations is referred to as stagnation. In Erikson's model of psychosocial development, during middle adulthood (approximately ages 40-65), an individual encounters the challenge of generativity versus stagnation. Generativity involves engaging in activities that contribute to the development of others, like raising children, volunteering, or mentoring. In contrast, stagnation occurs when an individual fails to achieve generativity, leading to a lack of productivity and connection with others, thus becoming self-absorbed and uninterested in societal or generational progression.