Hick’s Law

In the 50s William Hick (a British psychologist) examined the speed of perception and information processing. In his experiments he created tasks where the subjects had to select a specific information from a list of information. He measured the change of the time needed for a selection, when the list of information was reduced in size. [1]. The evaluations of the experiments resulted in a logarithmic curve. He approximated the curve with the following formula for the rate of gain of information:

Formula in MathML format (not all browsers support this by now):


Formula in PNG image format:

The entrophy H is derived from the sum of the probabilities (pi) of possible selections multiplied by a logarithmic value (where n is the number of choices). The logarithm of this suggests that human beings do not perform a linear search in lists.  We rather try to divide them into categories. This allows us to exclude half the possibilities at each step.

In HCI Hick’s law is used to compare different menu layouts in graphical user interfaces in order to determine which one is most effective.

[1]: William Edmund Hick. On the rate of gain of information. Quarterly Journal of Experimental Psychology, 4(1):1126, 1952.

Old Artist-Homepage

After several years I updated my homepage and decided to remove the design of my old artist homepage. As I liked the design, I loaded up an image where you can see how it looked like. Well, it looked nice but was not very easy to maintain if I wanted to add new images…
Here’s the old layout:

The old version of the page remains online until I decide to remove it… it is located here: Old artist pages

My Wife’s Felting Page

In 2007 my wife Inés and I  made a dream come true: participate to a medieval fair. Inés had gained much experience in felting, so she wantet to felt with children at the market. At castle Katzenstein (engl: cat stone) the spectaculum took place. We were overwhelmed by the mass of children that wanted to felt with us. We rarely had time to get something to eat or drink. But we had so much fun we decided to do that again.

For the presentation of the felt works of my wife I built a homepage. Inés felted some pieces especially for the design of the homepage. We should renew some part of the page. But for treasuring all those felted blooms, hats and bags the page perfectly serves our needs.


Here you can view the (german) page:

Flyer for the museum in Bad Buchau

This Flyer was designed for the museum in Bad Buchau, Germany, called “Federseemuseum”. Since 2008, the museum has an annual event about herbs. This year, my wife and I missed the event for the first time.