Describes the time required by a learning entity to acquire a new response.

It is the time when a new behavior (i.e., response) is being learned, or acquired.

In both biological and artificial neurons, it is the amount of time it takes for a new response to a new or previously acquired experience to be learned (or re-learned).

In ANNs, such as Netlab™, it is roughly determined by the learning rate configured for the learning algorithm used to adjust the connection strength.