According to Piaget, is a type of problem solving where individuals in the formal operational stage of development think more like scientists, devise plans to solve problems, and systematically test solutions.

What is your opinion about government shutdown?

How have people adapted physically to different environments? why do you think these differences developed?

People who spend more money on binoculars tend to know more about birds than people who spend less or none. this observation was almost certainly based on what kind of study? a. double-blind study b. correlation c. anecdote d. single-blind study