1. Describe the user interface tool known as the Model Human Processor [6]

The MHP attempts to portray the user of a computer system as a computer with memory areas and processors. The MHP was developed by Card, Moran and Newell in their book titled The Psychology of Human-Computer Interaction, published in 1983. The MHP draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of the computer user. This is done by a visual or audible stimulus being captured by the user with the physical attributes of the stimulus being decoded. For example, a user's attention is drawn to a box on the screen. The response that is needed will then be interpreted by the user. A motor response is then initiated to satisfy the response needed, for example, the click of a mouse button.

2. Identify and explain 2 examples of how the MHP could be applied to the interface [4]

Using an on-screen flashing cursor to show where data is to be input and using an audible stimulus (e.g. a beep sound) to indicate when an error has been made by the user.

3. The system will be a real-time system. Describe a real-time system [6]

A real-time processing system processes data at the time the data is input. The data must be handled within a specified maximum time limit. The time limit will depend on the user requirements and the processing the system has to carry out. It is usually accepted that the data will be processed as soon as it is received, thereby affecting the database records immediately. A real-time system is generally accepted as being one that reacts fast enough to influence behaviour in the outside world.

1. Explain how a user's perception and memory should be considered when the accounts system interface is being designed [6]

2. The new system will use  multi-user operating system. Describe a multi-user operating system [4]

3.Explain how colour should be considered when designing the HCI [4]