According to current theories of expertise, this shouldn’t happen. Becoming an expert in chess, for example, makes you better at chess but not anything else. But our findings suggest that becoming an ...

Optical illusions come in various forms, but we can categorize them into several main groups: irradiation, geometric illusions, brightness/color illusions, ambiguous figures, and impossible figures.

Sugihara asks. “The existence of such geometry-defying objects warns us of the potential dangers of optical illusions in our lives.” An "ambiguous object" is one with different appearances on ...

This illusion was discovered by German psychologist Herman Ebbinghaus in the 19th century. This and similar geometrical illusions have been studied by psychologists ever since. How much you are ...