Thread Subject: Re: Definition Consensus Decision: SimpleTactile Form
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From: Hoffman, Allen
Date: Mon, Mar 10 2008 8:55 AM
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I don't think this means you may not have to know some
inter-relationships to identify a tactual representation, but it means
that the complexity level can't be very high. Examples of switch
up/down is not the most appealing example for me, as that is quite
specific, e.g. feel the dip-switches and if the two switches on the
right are up, the unit is off, is pretty complicated in my view. I've
done the dip-switch thing often enough to say while doable, its not
something that doesn't require knowledge.
I think what we are really after is that "simple tactile" must be
discernible without use of application of arbitrary independent
meanings. so, for example, if a remote has buttons on it, and they have
tactile shapes, those shapes may be sufficient to identify the buttons,
unless they only had Braille which requires knowledge of Braille. This
is not a perfectly black and white line here.
so, per the keyboard example, it might pass as a common knowledge thing,
but who says what's common?
Really what we need is that tactile indicators are provided for hardware
sufficiently enough for someone without vision to use the device. N now
we've added the requirement that the user also does not need to know
any organized tactile communications mechanism either. As a Braille
reader, I think Braille should be considered sufficient, and am in
support of Braille literacy as a general rule. However, Braille doesn't
fit everywhere, to other forms of tactile communications must be
used--shapes, textures, combinations of shape and texture, which are
Allen Hoffman -- = EMAIL ADDRESS REMOVED = ; v: 202-447-0303
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[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Andi
Sent: Monday, March 10, 2008 10:35 AM
To: TEITAC Committee
Subject: Re: [teitac-committee] Definition Consensus Decision:
What about the arrangement of keys on a mobile phone or a QWERTY
I would think these are simple tactile forms but would fail the
definition because they require memorization of the spatial layout.
Sent by: "'TEITAC Committee'"
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03/09/2008 05:37 Consensus Decision: Simple
Please respond to
Please respond to
Following is the definition for Simple Tactile Form. If you do not agree
that this definition is acceptable, please reply and state your reason.
Simple Tactile Form
"Tactile form that does not require the memorization of any spatial or
temporal tactile patterns.
Note 1: Simple vibration or switch up/down positions are examples of
non-coded tactile forms.
Note 2: Braille, tactile Morse code, and vibration patterns are examples
of more complex tactile forms that require memorization of non-trivial
spatial and tactile patterns respectively.
Note 3: Different numbers of tactile buzzes, or different frequency
buzzes would be non-trivial patterns, and would not be simple tactile
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