Introductory Psychology CLEP Prep 2025 – 400 Free Practice Questions to Pass the Exam

In psychology, the term "critical period" refers to a specific time frame in an individual's development when a particular skill or behavior must be learned or else it may not be fully developed later on. Option A, B, and C may seem similar, but they do not accurately encompass the key element of vulnerability and formation that is associated with the critical period. Option A doesn't specify that it is the development of skills and behavior that are changing, not necessarily making changes in one's life. Option B only mentions past experiences, but the critical period can also include new experiences and learning. Option C mentions external factors, but those factors may still be relevant outside of the critical period. Option D is the most accurate because it highlights the time when the individual is still vulnerable and forming, making it crucial for certain skills and behaviors to be learned during that time.