The Chronicle of Higher Education has a long but interesting review of Thomas Kuhn’s The Structure of Scientific Revolutions. Entitled Shift Happens, the article goes through all the misinterpretations of Kuhn’s work, as well as some of the major criticisms his ideas have received over the years. I found this part particularly interesting:

Scientific revolutions, according to [Kuhn’s book], don’t occur when an apple happens to find the head of a genius, or when enough facts have slowly painted a new picture. Rather, in yet another of Kuhn’s inversions, new paradigms emerge to explain the accumulation of anomalies: findings that do not make sense within the current paradigm. For example, if your paradigm tells you that fire consists of the release of phlogiston embedded in flammable materials, then the fact that some metals gain weight when burned is an anomaly. When a new paradigm is conceived that makes sense of the anomalies, science is in for a revolutionary shift.

There is a definite parallel with design work here. We often try to shift users to a new interaction paradigm because we think it works better. That’s fine, and can be successful – tab-based browsing comes to mind. But these are incremental changes/improvements, and they happen whenever designers approach an existing problem in a new way. They’re worthy pursuits, but rarely essential for an application to still fulfill its purpose.

By contrast some interaction changes are absolutely essential, and we need to keep our eyes open to recognize those elusive circumstances. Essential interaction changes need to happen when existing paradigms can’t cope any more, and new ones are needed. For example, clicking with a mouse isn’t a thing on touch devices, so that particular interaction became an anomaly that couldn’t be “explained” by existing paradigms any more. Therefore we are legitimately creating new paradigms for mobile design to accommodate the change from mouse to touch. We’re still navigating our way through this change, as apps like Path and Clear emerge to challenge our views on what we consider good design.

We often spend our time trying to improve existing designs, and we need to do that. But there is always the danger of hitting a local maximum – “a point [where] you’ve hit the limit of the current design”. To fight this danger, let’s remember that our energy is sometimes best spent identifying areas where existing paradigms are bursting at the seams in their ability to accommodate the design status quo. That’s where the opportunities for design revolution truly lie.