Based on research, an individual is typically not considered immature at 18, particularly concerning executive function development. Studies show that while there is rapid development of executive functions between ages 10 to 15, these functions continue to mature, with small but significant changes, through mid-adolescence, ages 15 to 18. According to research, adult-level performance in executive functions is reached between ages 18 to 20.
Understanding Executive Function Development
Executive functions are cognitive skills that control and manage our thoughts and actions. These include:
- Planning: Organizing tasks and thinking ahead.
- Working Memory: Holding and manipulating information in mind.
- Attention Control: Focusing on relevant information and ignoring distractions.
- Inhibition: Controlling impulsive behaviors and responses.
| Age Range | Executive Function Development |
|---|---|
| 10-15 | Rapid Growth |
| 15-18 | Small, Significant Changes |
| 18-20 | Adult-Level Performance |
The reference clearly indicates that executive function development reaches adult-level performance by age 18-20. Therefore, while there may be individual differences and continued growth in other areas, at 18, one is generally considered to have reached an adult level in terms of their core cognitive functions.
