Social comparison theory is the idea that individuals determine their own social and personal worth based on how they stack up against others. The theory was developed in 1954 by psychologist Leon ...

A few years ago, psychologist Susan Silk and her friend Barry Goldman wrote about a concept they called the “Ring Theory.” It’s a theory to help yourself know what to do in a crisis.

Its extreme simplicity and lack of practical utility led to its speedy demise. Having discussed theory, ethics, and some real-world examples of age-specific design, let me distil a few handy tips you ...