Examlex
Which of the following is not a virulence factor of Bordetella pertussis?
Preoperational
A stage in Piaget's theory of cognitive development, occurring from approximately 2 to 7 years of age, characterized by symbolic thought but not yet capable of logical operations.
Second-Order Operations
Second-order operations refer to the ability to think about thoughts themselves, involving complex cognitive processes like reflection and abstraction, often developing during adolescence.
Abstract Operations
A stage of cognitive development according to Piaget, characterized by the ability to think logically about abstract concepts and hypothetical situations.
Concrete Operations
A stage in cognitive development, as described by Piaget, where children gain the ability to think logically about concrete, tangible objects and events.
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