Hi James,

> Hi All,
> I think it may help people here if I inject some theory into
> this discussion.
> The first point is that people keep making claims that the method has
> some scientific validity. For example Liz says that "Hopefully my quick
> elucidation about the original persona creation methodology helps you to see
> that the mapping of individuals to dimensions of interest is a relatively
> scientific method"
> Either a method is scientific or pseduscientific. There is no middle ground.

Josh already give his explanation on this, which I fully agree.

> The point is that unless you can show that you are designing for Users and
> not something fictional then it is hard to call it User Centred Design
> Is there a way out of the theory Trap. I think yes there is. Idea one is to
> treat a design as a Hypothesis and test it. Idea Two is to go back to the
> Sciences that have contributed methods to UCD, like Anthropology, and see
> how they overcome some of the Theory Challenges. For example many people on
> the list complain about the time that it takes to go through the research,
> and to distil the ideas. Ethnography was developed as a
> descriptive language. Or go  to Activity Theory which is another descriptive
> process.  If you use either the language of Ethnography or the methods of AT
> it will save you time. Forget about trying to get data to jump out at you.
> This is called Grounded Theory and it is time consuming and very hard to
> follow correctly. Also come up with some ideas before the research and then
> test them (in a negative wayi.e.... my theory is not true if.....), again
> this will both save you time and can be quite reliable.

For any domain, there's two layers, one at theory layer (laws/theory)
while the other at the application layer(methods, etc.) , for
interaction design, it's about the same.  Persona is belongs to the
application domain.

As guys above ( include me ) said, the persona is based on the user
research (more than x% is y or blahblahblah ), and the key result is
the people's context, motivation, needs, experience and related
stuffs. And we adopt the persona to put the analyze result into some
design & communication
format, that's the major purpose of this application method.    And it
avoid this too general elastic users ( which is exactly harm the real
UCD) in the whole design process.

>From Action Theory's perspective ( theory perspective), human and
outside world's relationship is realized by activity, And activity's
structure's key components are the human(subject), and his goal
(object), and possibly the artifact as the mediator ( physical or none
physical). persona is exactly
the application method to describe the human in the activity ( his
needs, motivation, constrains, experience ) , which turns the theory
explanation into practicable method.

We don't use the theory directly, instead there's many methods applied
everyday, persona is one of the good example.

Regards,
Jarod

-- 
http://designforuse.blogspot.com/
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