William Lidwell

The Director of Design at Stuff Creators Design in Houston and author of the best-selling design book, Universal Principles of Design.

William Lidwell

The Director of Design at Stuff Creators Design in Houston and author of the best-selling design book, Universal Principles of Design.

Design Principles – Constrains simplify usability and minimize errors

Constraints limit the possible actions that can be performed on a system. For example, dimming or hiding options that are not available at a particular time effectively constrains the options that can be selected. Proper application of constraints in this fashion makes designs easier to use and dramatically reduces the probability of error during interaction. Constrains simplify usability and minimize errors.

Quotesthetics and Face-ism Ratio
Face-ism – The ratio of face to body in an image perception!

The ratio of face to body in an image — face-ism ratio — influences the way the person in the image is perceived!

It was found, that irrespective of gender, people rate individuals in high face-ism images as being more intelligent, dominant, and ambitious than individuals in low face-ism images.

The level of control and the experience level of the people using the system

The level of control provided by a system should be related to the proficiency and experience levels of the people using the system. Since accommodating multiple methods increases the complexity of the system, the number of methods for any given task should be limited to two—one for beginners, and one for experts. Beginners do best with a reduced amount of control, while experts do best with greater control.

The effect of face-ism in media and advertising!

The effect of face-ism in media and advertising!

It was found that images of men in magazines, movies, and other media have significantly higher face-ism ratios than images of women. This appears true across most cultures, and is thought to reflect gender-stereotypical beliefs regarding the characteristics of men and women.

The cost-benefit principle in UX Design

The quality of every design aspect can be measured using the cost-benefit principle

If the costs associated with interacting with a design outweigh the benefits, the design is poor. If the benefits outweigh the costs, the design is good.

For example: How long is too long for a person to wait for a web-page to load? The answer to this question is that it depends on the benefit of the interaction.