*1 -* *what are the approaches/ methods towards the most optimized lay-out
on key-boards?*(in other languages)
According to the nature of the language and alphabet, for example to
minimize cognitive load, to enhance typing speed, to distribute letters on
keyboards equally for both hands, ... .It would be a stage before the user
test.e.g. that if I have to find the 100 most frequent words, what will be
the approach to identify those words?
*2 - In the event that I have come up with the most optimized lay-outs(e.g.
5 final lay-outs), How could I test them by the users feedback?*
The challenge for me is how to present final lay-outs to the defined users
so that I can have their feedbacks for choosing the most optimized one. to
see how they re-act to the new lay-outs. Actually I am seeking the simple
practical and scientifically acceptable way(if any). How can I specify
different lay-out letters to the keys on key-boards? Is there any program
that could define different lay-outs(manually) for keyboards?