[thelist] How long is a usability piece of string?

[Shirley Kaiser, SKDesigns]

Martin,

Jakob Nielsen, a usability expert (although controversial for his strong 
opinions!) says you can do fine with 5 people for user testing. There's an 
article about it at his site at http://www.useit.com.

Personally, I try to get as many people as possible, usually at least 5-10 
or so, depending on how lucky I get for people to do this. I also try to 
get people of varied levels of experience using the Internet to attempt to 
get a good cross-section. If it's a specific target, then I tend to tune in 
closer to the type of target model.

If we discover bumps to adjust, then I do another round after I've changed 
things, too, of course.

I'll be curious to hear what others do. What do you think is reasonable?

Warmly,
Shirley
-- 
Shirley E. Kaiser, M.A.
SKDesigns  mailto:skaiser at skdesigns.com
Website Development  http://www.skdesigns.com/
Pianist, Composer  http://www.shirleykaiser.com/


At 05:37 AM 01/23/2001, you wrote:

>Here's question for you:
>
>How many person/days would you expect a credible usability
>workstream to take for a reasonably large site (would typically
>include both product and non-product info, and shopping)?
>
>Cheers
>Martin