Dr. Snow studies attention deficit hyperactivity disorder among 4th grade students by attending the 4th grade class and spending the majority of time tallying how often students fidget in their seats. Dr. Snow is a(n)

Why is the concept of base rate important in decisions that involve the representativeness heuristic?

a. People usually don't pay enough attention to base rate when making these decisions. b. People are so aware of information about base rate that they typically make accurate decisions. c. People rarely make the small-sample fallacy when making these decisions. d. When people have a background in statistics, they are much more likely to make correct decisions on tasks involving the representativeness heuristic.

Preoperational intelligence differs from sensorimotor intelligence in that preoperational intelligence

goes beyond senses and motor skills. includes logical reasoning. is characterized by reversibility of thought. is comprised of simple abstractions.