Final answer:
An unresolved identity crisis may lead to negative identity development. Adolescents who fail to establish a strong sense of self may struggle with role confusion and encounter difficulties developing intimate relationships later in life. Erikson's model emphasizes the importance of overcoming each life stage's specific challenge for healthy psychosocial development.
Step-by-step explanation:
If an identity crisis is not resolved, it can lead to several negative behaviors, but the options provided in the question do not all represent outcomes of an unresolved identity crisis according to Erik Erikson's theory. However, 'a) Negative identity' is a possible outcome. In addition to a negative identity, other potential behaviors or conditions might include confusion in various life decisions, low self-esteem, and difficulties in forming close relationships. It's not typically said that 'intimacy', 'time perspectives', or 'industry' are direct outcomes of an unresolved identity crisis; however, they can be affected by the state of a person's identity.
Erikson's stages of psychosocial development articulate that in adolescence, the challenge of identity versus role confusion is faced. Failure to navigate this phase successfully can leave a young person with a weak sense of self and potential role confusion, making them vulnerable to negative identity development. These adolescents struggle to find their place in society and may engage in negative behaviors as a means of coping or asserting an identity, though it may not align with their true self or potential.
In Erikson's framework, the challenge for elderly individuals is 'a. Overcoming despair to achieve integrity.' For those in the intimacy vs. isolation phase, found in early adulthood, establishing meaningful relationships is critical, and difficulties here may stem from unresolved identity issues experienced during adolescence.