Chapter #3 Interaction Elements Flashcards
Interaction:
when a human performs a task using computing technology
Indirect pointing
A cursor or a symbol is needed. Ex a mouse
Direct pointing
No cursor is needed. Ex light pen, stylus
Spatial Hysteresis
A zone around the selection button that still allows the button to be clicked even if it wasn’t directly clicked. Ex Its close enough to count as a click
Single-Switch Scanning
Linear Scanning
Two Tier Scanning
one button used for input
Used in the scanning key boards
Linear Scanning: one letter at a time
Two-tier scanning: one row at a time
Gesture input
movements as input or to communicate
Hard controls
physical and single purpose devices
Soft controls
Interfaces created in software (like digital buttons)
Control-Display Relationships:
also know as mappings relationship between operation of a control and the effect created on a display.
Spatial Relationships:
Congruence: Control -> , Display ->
Transformation: Control forward, Display up
Dynamic Relationships:
how the controller affects the speed of the response
Physical Relationships:
Describes whether the response is a movement or a force in the controller.
CD Gain
Control to Display gain in movement
Latency
Delay between an input action and the corresponding response on a display
Property Sensed
The input devices
Order of Control:
The display response to the property controlled
Joystick, there are 2
Isotonic: Senses displacement of the stick (good for position control)
Isometric: Senses force applied to the stick (good for velocity control)
Mental Model/ Metaphors:
a physical understanding of an interface or interaction technique based on real-world experience
Modes
a functioning arrangement of condition
Ex: Phone message light, on or off based on if a message is there
Ex: Keys on a keyboard can have multiple outputs, 3 and #
Nokia basically invented this
Mode switching, ex im powerpoint presenting, not presenting, uses multiple different buttons. Ex mode button on a watch
Accelerometers
allows tilt or motion as an input, in many new phones
Interaction errors:
Human and computer interaction error where there is a human error. Ex CAPS LOCK ON, while typing a password, hence many logins will say caps lock is on to prevent this interaction error.
Ex: scrolling frenzy, trying to highlight something but it scrolls farther down
Ex: focus uncertainty, filling a box might moe to the next, or tab might work or neither and you might have to manually click. Ex phone number 3 boxes
Ex: Auto complete, does tab work? Clicking it? enter?
