A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned (in syzygy) exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can occur only the night of a full moon.
Behaviorism that is positivistic in that it describes relationships between environmental events and behavior rather than attempting to explain those relationships. Skinner's approach to psychology exemplified descriptive behaviorism.he version of behaviorism that accepts the contention that overt behavior should be psychology's subject matter but is willing to speculate about internal causes of behavior, such as various mental and physiological states.
Functionalism is a theory about the nature of mental states. According to functionalism, mental states are identified by what they do rather than by what they are made of. This can be understood by thinking about artifacts like mousetraps and keys. In particular, the original motivation for functionalism comes from the helpful comparison of minds with computers.