Final answer:
Personality can be influenced by psychological conditions such as schizophrenia, the impact of substance abuse, personal experiences like break-ups or divorce, and cultural contexts. These factors may bring out different aspects of a person's character or fundamentally alter their personality.
Step-by-step explanation:
The circumstances where various effects can influence personality are multifaceted, encompassing psychological conditions, personal experiences, and cultural contexts. For instance, schizophrenia is a severe mental disorder that can drastically affect personality, potentially leading to a dissociation between thought and emotion, which may seem like a 'duality of man.'
Substance abuse can alter personality, as certain drugs can lead to changes in behavior, mood, and cognitive function. In literature, youth depression is explored in works like 'The Catcher in the Rye,' indicating how common and impactful this condition can be on a young person's psyche, sometimes leading to dire outcomes such as
Further, life events such as a break-up or a divorce, as depicted in Raymond Carver's 'Popular Mechanics,' can drastically reshape one's personality, often bringing out sides of individuals that were previously unexpressed or subdued.
Cultural influences also play a significant role in shaping personality. For example, collectivist societies typically exhibit less extroversion than more individualist cultures. This highlights the importance of considering the cultural context when studying personality traits.