With reference to Jean Piaget's theory of cognitive development, which of the following is the most prominent and specific intellectual characteristic of the 'Formal Operational Stage' (approximately from 11 years to adulthood)?

According to Jean Piaget's theory of cognitive development, the most prominent feature of the 'Formal Operational Stage' (which starts around 11 years of age and lasts into adulthood) is the development of hypothetico-deductive reasoning, abstract thinking, and the ability to solve problems using a scientific approach.

Key Characteristics:

• Hypothetico-Deductive Reasoning: Ability to scientifically test hypotheses.
• Abstract Thinking: Capacity to think about abstract concepts without needing concrete touchpoints.