In Piaget's theory, the tendency to view the world only from one's own perspective, characteristic of the pre-operational stage, is ____.

Charles is setting up a factory to build a gadget he invented. To maximize his profits, he wants to get the highest level of production out of his employees. Which reinforcement schedule should Charles establish for the factory workers?

a) Fixed time b) Fixed intervals c) Variable duration d) Response rate

Circadian rhythms are controlled by a biological clock, located in a cluster of cells in the hypothalamus

Indicate whether this statement is true or false.