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Name calling 6 Sep 2012 | 03:30 am
The risks of title proliferation and the boundaries of UX Starting my current job 15 years ago, I opened my new box of business cards and read: “Michael Zuschlag, Engineering Psychologist.” I’m an eng...
New Blog Launched 2 Apr 2012 | 03:36 am
It’s time I branch out to other on-line projects than this blog. I’ve still a few things to say about usability, but I feel the need express my other interests as well. I considered a blog on Christma...
Stat 203 9 Mar 2012 | 12:21 pm
Comparing Counts Calculating probabilities for two-category responses. Binary choice testing. A-B testing. Normal approximations for categorical data, and its limits. Binomial, Fisher’s Exact, Ch...
Stat 202 7 Feb 2012 | 08:41 am
Comparing Averages, Part 2 Comparing two new proposed designs. Two-tailed versus one-tailed t-tests. Maximizing power with experimental design. Within-subject testing. More on the normality assum...
Stat 201 8 Jan 2012 | 09:28 am
Comparing averages, Part 1 The second in a series on inferential statistics, covering: Improving on an existing UI design. Estimating needed sample sizes. The normality assumption. Between-subjec...
Really Significant Statistics 8 Jan 2012 | 09:07 am
A series on statistics applied to usability engineering Now you’ve done it. You should’ve kept your mouth shut. There you were, comparing user ratings between a couple web home pages, and, to your di...
The Quality of Quality UIs 5 Oct 2011 | 11:09 am
UX as the key to quality products When I was a usability engineer for a telecommunications development firm, there was a big push for ISO 9001 certification, which was intended to indicate that we pr...
Breaking the Color Code 8 Jun 2011 | 11:24 am
Effectively using color to represent data. A continuation of Putting the G in your GUI. The primary reason for including colors in your UI can be understood by the logical synthesis of two basic pri...
AdCD 2 Apr 2011 | 02:44 am
Today I awoke with an epiphany. The information age is over. For the internet, information is no longer the product, and users are no longer the consumers. The value of something to society is indexed...
Major Web Standards for General Usability 7 Mar 2011 | 05:30 am
Using published standards and guidelines to catch usability issues. What can I say? We blew it. The web came along, and we human factors engineers were AWOL. Not that anyone tried to include us. I kn...
