The collection of mental processes and activities used in perceiving, learning, remembering, thinking, and understanding, and the act of using those processes.
The process of selecting, organizing, and interpreting a sensory information.
Phenomena can be understood by careful thought and logical proof.
Phenomena can be investigated by careful, objective observation.
Plato's Nature of Reality
Reality resides not in the concrete objects we perceive but in the abstract forms that these objects represent.
Aristotle's Nature of Reality
Reality lies only in the concrete world of objects that our bodies sense.
Posterior = Likelihood * Prior
Observed behavior provides the only valid data in psychology; hypotheses about internal thoughts are nothing more than speculation.
To understand psychological phenomena as organized, structured wholes. The whole differs from the sum of its parts.