Barney and Fred both hear the same loud noise. Barney thinks it's thunder whereas Fred thinks it's a dinosaur. Their different reactions are based on different:

Evolutionary developmental psychology

A) focuses on how the structures of the mind develop to better fit with, or represent, the external world. B) seeks to understand the adaptive value of specieswide cognitive, emotional, and social competencies as those competencies change with age. C) views the human mind as a symbol-manipulating system through which information flows. D) brings together researchers from psychology, biology, neuroscience, and medicine to study the relationship between changes in the brain and the developing person's cognitive processing and behavior patterns.

Which of the following is a developmental accomplishment during the concrete operations stage?

a. conservation of mass b. perspective taking c. abstract thinking d. object permanence