User Delay Models from Psychological Studies

If the content of the user interface of an STD state is known, the length of the user delay can be predicted based on it. There are three basic processes involved in a user's response to a system according to the model human processor [3]. They are the perceptual, cognitive, and motor processes. Before the user physically touches the system input peripherals, the system is idle, except that it may display a flashing cursor to indicate the current location for user input, which can be disabled in most applications without much sacrifice in user-friendliness.