Coordinality - A Measure of Man-Machine Coupling

In situations in which the human operator is asked to transmit as much information as he can, it has been observed that the amount of information he transmits varies with the number of variable aspects of the source and the number of physical dimensions used in coding. A simple logarithmic relation is postulated between a measure of these coding properties, called coordinality, and the information transmitted by the human operator. Many problems remain, however.