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C. Models of
AT, Functional Needs, & Human Performance
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HAAT Model:
Human Activity Assistive Technology
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"System"
that includes human and AT |
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"Activities"
-- Recognize/specify the Need (or desire)
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Activities
determined or related to life roles |
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Activity
accomplished by completing a set of tasks |
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Activity
carried out within a context |
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Human as
"Intrinsic Enabler"
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"Human
operator" with underlying abilities to perform activities/tasks |
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Classification
into:
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Sensory
input, central processing, effectors
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central:
perception, cognition/memory, motor control (p. 82)
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Ex
for motor control (p. 123): Speed-accuracy tradeoff (Fitts'
Law), reaction times |
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"Ability"
as basic trait a person brings to a new task |
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skill
is a level of proficiency (in performance)
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"Learning"
often involves breaking activity into tasks to master |
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Basic
performance areas: self-care, work/school, play/leisure |
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AT's as
"Extrinsic Enablers"
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Interaction
via "Human-Technology Interface"
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Ex:
Seating/positioning devices; Control interface; Displays, ... |
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AT
"Processors" |
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Augmentation
or Replacement of "Activity Outputs" |
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Environmental
Interface (i.e., "HAAT System" boundary) |
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Design
"Process"
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Access
needs, goals (related to desired activities), skill |
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Determine
AT system characteristics |
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Conceive
design plan, system |
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develop/deliver
(and perhaps provide training) |
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Design
"Outcomes"
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Becoming
more and more a critical "driver" of service delivery |
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Effectiveness
- impact of "product" on consumer's life & needs
("Does it work?") |
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Efficacy -
ability of produce a desired result or effect ("Can it work?") |
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