Final answer:
The conscious construction of a personal self-narrative typically becomes more focused during early adulthood (20s to early 40s), a time marked by the exploration of identity and the formation of intimate relationships. It involves a critical analysis of one's experiences and the establishment of a self-concept, often paralleled in the process of writing autobiographical or biographical narratives.
Step-by-step explanation:
The construction, debate, and logical analysis of a personal self-narrative generally become more pronounced during early adulthood, which spans from the 20s through early 40s. This is the period when individuals are not only exploring intimacy versus isolation but are also solidifying their identity. A strong sense of self, which begins to develop in adolescence, is essential before forming intimate relationships with others. The development of the self-narrative is instrumental in this phase of life as people construct and analyze their experiences and choices critically, as proposed by developmental theories such as those by Erik Erikson.
In the context of literature and writing, the conscious decision-making process concerning the crafting of narratives, in either autobiographical or biographical forms, begins as the author becomes capable of critical thinking and reflection. While for some, this may happen in adolescence, for many, it becomes more refined in adulthood when they have richer experiences and greater cognitive development to draw upon. Thus, when a person starts to write their narrative, they often start with the development of the plot and the organization of events, eventually moving towards refining the characterization and point of view. This evolution in writing parallels the growth of the self-narrative, as individuals understand themselves in relation to their experiences.