Final answer:
The pre-adolescence stage in Piaget's cognitive development model is referred to as the formal operational stage, beginning around age 11.
Step-by-step explanation:
The pre-adolescence stage in Piaget's cognitive development model is called the formal operational stage. This is the final stage in Piaget's theory, which starts from around age 11 and up. During this stage, children become capable of handling abstract concepts and hypothetical situations. They move beyond concrete experiences to abstract thinking, which allows them to tackle problems that do not have immediate, tangible solutions. This stage is marked by the ability to think logically about abstract propositions and test hypotheses systematically. It is also the stage where adolescents begin to think more about moral, philosophical, ethical, social, and political issues that require theoretical and abstract reasoning.