Any stimulus that is below our absolute threshold cannot be detected. After a stimulus is over our absolute threshold, we will be able to detect it normally until it reaches the terminal threshold, where the stimulus is strong enough to be painful and cause damage. There also may be a difference in how strong or weak a stimulus is, but you can't always detect it. If it is, then it exceeds our difference threshold (the smallest amount of stimulus that can be changed and detected half the time). There are three different principals dealing with JND, which are all about stimuli and detection. The first one is Weber's law, which states that the size of JND is proportional to the intensity of stimulus. So, the JND is large when intensity is high, and small when intensity is low.
Any stimulus that is below our absolute threshold cannot be detected. After a stimulus is over our absolute threshold, we will be able to detect it normally until it reaches the terminal threshold, where the stimulus is strong enough to be painful and cause damage. There also may be a difference in how strong or weak a stimulus is, but you can't always detect it. If it is, then it exceeds our difference threshold (the smallest amount of stimulus that can be changed and detected half the time). There are three different principals dealing with JND, which are all about stimuli and detection. The first one is Weber's law, which states that the size of JND is proportional to the intensity of stimulus. So, the JND is large when intensity is high, and small when intensity is low.
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