The Number of U

question 26

Multiple Choice

The number of U.S. workers in unions today is:

• A) roughly equivalent to what it was in the 1950s.
• B) about 13%of all wage and salary workers.
• C) just under 15 million Americans.
• D) not something we can estimate due to the lack of information on all people in the labor market.

---

Definitions:

Formal Operations

The final stage in Piaget's theory of cognitive development, occurring from around age 12 onwards, where individuals develop the ability to think abstractly, logically, and systematically.

Object Existence

A cognitive development concept where an individual realizes that objects continue to exist even when they are out of sight or perception.

Stage-Like Fashion

A manner of development or progression in distinct stages or phases.

Piaget's Theory

A developmental theory created by Jean Piaget that suggests children move through four stages of cognitive development as they grow.