Interaction/Interactivity

Interactivity is essentially the dialog between the human and the computer. For something to be interactive, there must be input from a learner and response from a program. From something as simple as inputting a math problem into a calculator to performing as complex as performing a chain of attacks in a video game, interactivity is an essential part of digital learning.

Source: http://www2.gsu.edu/~wwwitr/docs/interact/