ES321 EXERCISE 2

 Exercise 2

Pick a couple of computer input devices that you are aware of (joystick, light pen, touchscreen, trackball, eyegaze, dataglove, etc.) and note down how each has different attributes that support certain forms of interaction. You ought to know a little about all of these devices - if you do not, research them.

The following devices are input devices that supports Human-Computer Interaction:

In computing, a keyboard is a typewriter keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. With the decline of punch cards and paper tape, interaction via teletype-style keyboards became the main input device for computers. Supports interaction by having the users to input their commands by pressing its buttons or keys.

A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT TV set or monitor. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional accuracy. Interactions occurs when users points the pen to the screen.

A touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area. It enables one to interact directly with what is displayed. Similar to a light pen, touchscreen carries interaction by allowing the user to manipulate a device through touching it by hands or fingers.

A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes.

A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer.

As you can see, this devices are commonly used to manipulate the Computer, which results to what they called as "Interaction".