Difference threshold

Difference threshold, also known as the just noticeable difference (JND), is the smallest change in a stimulus that a person can detect half the time. For example, it’s the minimal increase in weight or volume needed before you notice a difference. This threshold varies depending on the type of stimulus and the context, but it helps explain how sensitive our senses are to changes around us. Essentially, it’s the point at which a difference becomes noticeable, allowing us to distinguish between two similar stimuli.