Variability in Brain Function and Behavior

Information. An increasingly difficult and important term to define. Central to the concept is that there are aspects of reality which need to be characterized not in terms of matter or energy but rather in terms of the particular organized forms taken by one or the other or both. Similar information, for example, can be embodied as signals in motions of the air (sound waves), ink on a page (printed text), or a series of ones and zeros (on a hard disk in a computer).