Just Noticeable Difference (JND)

Just Noticeable Difference (JND) refers to the smallest change in a stimulus that can be detected by a person. For example, if you are holding a weight, JND is the minimum amount of added weight that you can feel as a difference. This concept varies for different senses and situations; for light, sound, and taste, the amount needed for a noticeable change differs. JND helps us understand perception limits and plays a crucial role in fields like marketing and design, where subtle changes can significantly impact people's experiences and choices.