Term
| What kind of interaction devices are there? |
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Definition
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Term
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Definition
| Tansducer that senses physical properties of people, places or things |
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Term
| What is an interaction technique? |
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Definition
| Fusion of input and output, consisting of all hardware and software elements, that provides a way for the user to accomplish a task for a particular conceptual model |
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Term
| Characteristics of input devices |
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Definition
- Physical properties sensed
- Number of dimenstions
- Direct vs indirect inputs
- States sensed
- Transfer functions
- Other characteristics (sampling rate, footprint, homing time..) |
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Term
| Physical properties sensed |
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Definition
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Term
| What is a relative positioning device? |
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Definition
| use displacement vector as input signal -> turning computer off and on - > always starts at 0 |
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Term
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Definition
Direct input devices unify input and display surfaces
Indirect input devices have separate input and display surfaces |
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Term
| Advantages/disadvantages of indirect input devices |
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Definition
+ no occlusion
+ can have higher precision
+ scales better for large output screens
- Requires explicit representation (cursor) |
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Term
| Graphical input devices can be modeled with which three states? |
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Definition
State 0: no effect, State1: Move cursor, State 2: Activate
e.g. mouse: state 0: not moving the mouse, state 1 move cursor, state 2, button down (can still move cursor) |
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Term
| From input signal to output |
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Definition
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Term
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Definition
| sense relative position of neighboring parts in the body. e.g. feeling the position of own finger after moving on a trackpad |
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Term
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Definition
sense outside stimuli
- Feedback actively produced by the computer, e.g. seeing the cursor move
- Feedback from the physical form of the manipulandum, e.g. feeling the solid surface of the trackpad |
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Term
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Definition
Mathematical relationship between input space and display space
- Identical transformation I(x), e.g., touch screens
- Linear transformation, e.g. mouse, trackpad |
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Term
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Definition
Control-display gain
[image] |
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Term
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Definition
dynamically changing CD gain according to the movement velocity
primary submovement -> fast -> trigger high CD gain -> quickly cover a distance
secondary submovememtn -> slow -> trigger low CD gain -> precise cursor control |
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Term
| how we move while pointing? |
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Definition
primary submovement: ballistic (don't use visual feedback for adjusting the course), relatively high velocity
secondary submovemet: corrective, use visual feedback, relatively low velocity |
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Term
| Formally representing input devices: primitive movement vocabulary |
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Definition
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Term
| What does the M stand for in the primitive input device formula? What are the possibilities? |
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Definition
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Term
| What does ln and Out stand for in the primitive input device formula? |
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Definition
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Term
| What does the S, R stand for in the primitive input device formula? |
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Definition
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Term
| What the W stand for in the primitive input device formula? |
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Definition
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Term
| What is the second possibility to formally represent input devices? |
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Definition
composition operators
[image]
[image] |
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Term
| Composition operators shown graphically |
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Definition
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Term
| What is the use of a design space of input devices? |
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Definition
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Term
| How is speed measured in text entry devices? |
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Definition
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