Time Sharing Flashcards
What is time-sharing?
Describing an operator doing two or more things at one time.
What accounts for the variation of success of time-sharing?
Examining the process mechanisms of:
confusion
resource demand
switching and allocation
What is resource demand?
Amount of mental effort a task
demands
What is Automatic processing or Automaticity?
When a task can be processed
with little or no attention to resources
What are Data-linked (data limited) tasks?
Limited by the quality of data,
not the resource invested.
What are Resource-Limited tasks?
When resources are divided and neither task is data-limited, then, there must be some trade-off in
performance.
What is confusion?
As similarity in input increases, such as when two verbal
tasks are being performed, the effect tends to be a reduction in time-sharing efficiency.
What is Switching and allocation?
The way in which tasks or
channels are combined and the emergent properties
associated with those combinations
How can you optimize allocations between tasks and channels?
Multi-modal/multisensory interfaces
What are the four dimensions of the multiple resource model (4D MRM) ?
Processing stages
Perceptual modalities
Processing code
Visual channels (focal and
ambient).
What are Processing Stages?
Stages directly relating to the human information
processing model
What are Perceptual Modalities?
Refers to the different types of stimulus information that can be perceived by a person.
What are processing codes?
Deals with the accepted concept that spatial and verbal processes
(codes) often associated with two cerebral hemispheres
What is Verbal processing?
Process of forming ideas by assembling symbols into
meaningful sequences.
What is spatial processing?
Process of forming ideas through the spatial relationships
between objects.
What are the two visual channels?
focal vision
used in fine detail and pattern recognition
ambient vision
involving peripheral vision, used for sensing orientation
and ego motion
What is the S-C-R scheme?
stimuli-central processing response (S-C-R) compatibility scheme
What implications have come from the S-C-R model?
information can be processed more quickly if stimuli (S) is matched with an appropriate response (R).
What are the implications of the 4d MRM model?
Successful use of this model will lead to increase performance by:
more efficient time-sharing
changes in the difficulty of one task will not have much of an effect on the performance of the other task
What is cross-modal cognition?
When one modality subconsciously influences perception in another modality (example: when taste is enhanced by odor).
What is multimodal cognition?
When one modality subconsciously influences perception in another modality (example: when taste is enhanced by odor).
