Final answer:
The cognitive developmental level of the adolescent according to Piaget is the formal operational stage, where they are capable of abstract and hypothetical thinking.
Step-by-step explanation:
The cognitive developmental level of the adolescent according to Piaget is the formal operational stage. This stage is the fourth and final stage in Piaget's theory of cognitive development, which begins around age 11 and continues into adulthood. During this stage, adolescents develop the ability to think abstractly and hypothetically. They are able to use abstract thinking to problem solve, consider multiple perspectives, understand hypothetical situations, and test out different solutions. This level marks a significant difference from the concrete operational stage, where children are able to think logically only about concrete events.
In contrast to early stages such as the sensorimotor and preoperational stages, the formal operational stage enables adolescents to think about abstract concepts and reason about outcomes that are not directly observed. Despite critics suggesting the possibility of a postformal stage in cognitive development, Piaget's formal operational stage remains a key concept for understanding the cognitive capabilities of adolescents.