In which stage of Piaget's theory of cognitive development do people begin to think logically about abstract concepts?
A) the sensorimotor stage
B) the formal operational stage
C) the concrete operational stage
D) the preoperational stage
Answer: B
Rationale: The formal operational stage is characterized by the capacity for abstract and hypothetical thinking.
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Changes in the physical appearance of adolescents, such as growth of facial hair in boys and breast development in girls, are called
a. primary sexual characteristics. c. differentiations. b. secondary sexual characteristics. d. puberty.
Which of the following is a characteristic of early adulthood?
A. Peak physical abilities B. Weight gain tendencies C. Diminished muscle strength D. Slowed reaction times
Peter wants to study how individuals with depression differ in their content awareness compared to individuals without depression. To achieve this, what should Peter ask his participants to focus on?
A. Encourage the participants to daydream and report about their stream of consciousness. B. Ask the participants to identify and evaluate the physical sensations they are experiencing. C. Instruct the participants to identify things they can see and hear in their immediate environment. D. Request that participants continually assess their level of alertness and attention.
The opponent-process theory of color vision proposes the existence of
A. two color channels. B. four color channels. C. two types of cones. D. two types of rods.