Want to make the passcode on your iOS device more complex and secure? Read on for how to use a custom alphanumeric passcode on iPhone and iPad. A six-digit numeric passcode is the default when you ...

What Is an Optical Illusion? An optical illusion is a visual phenomenon where the brain misinterprets what the eyes see. Instead of showing reality exactly as it is, optical illusions manipulate ...

Figure 1: Mean (+1 s.e.) consistency of colour associations for 150 items (letters, arabic numerals and words), plotted separately for each of 11 categories tested. Figure 2: Mean voice-onset times ...

A string of characters containing both letters (A-Z) and numbers (0-9). An alphanumeric text entry field will accept both letters and numbers. An alphanumeric keypad is one with both letters and ...