According to Siegler's overlapping waves theory, cognitive development is best conceptualized as
a. random in nature.
b. a set of stages.
c. controlled by unconscious factors.
d. a process of variability, choice, and changes.
Question 2
Which is true with regard to the effects of play on development?
a. Preschoolers who engage in considerable amounts of social pretend play tend to be more popular and more socially mature than those who do not.
b. Play contributes significantly to physical and social development, but has little impact on the development of cognitive skills.
c. While engagement in pretend play tends to stimulate creative thought processes, it tends to interfere with the development of logical thought.
d. Play contributes to the emotional development of preschoolers by helping children work through unresolved conflicts, but it detracts from children's intellectual development by keeping them from engaging in more productive academic tasks.
The development of ancestral tetrapods.
Theory of Endosymbiosis
Fetal development from 1 month to 9 months
Critical Periods of Development
Gate control theory. A. open gate, B. closed gate
Development of homoplasmy from heteroplasmy by replicative segregation