In Piaget's theory, the tendency to view the world only from one's own perspective is
a. centration.
b. authoritarianism. c. conservation.
d. egocentrism. e. irreversibility.
Question 2
Weber's constant for brightness of lights is
a. one-seventh.
b. one-tenth.
c. one-sixtieth.
d. one-fiftieth.
e. one-twentieth.