Question

JND stands for:

Select one:
a. Just noticeable theory
ob. Just noticeable direction
c. Just negotiable difference
d. Just noticeable difference​

Answer 1

JND stands for just noticeable difference, a key psychological term indicating the smallest detectable change in stimulus. Involved with Weber's Law, it suggests a proportional relationship between stimulus intensity and JND.

Step-by-step explanation:

The acronym JND stands for just noticeable difference, which is a concept in psychology and sensory physiology referring to the smallest amount of change in a stimulus that can be detected 50% of the time. This concept is closely related to Weber's Law, which proposes that the JND is proportional to the baseline intensity of the stimulus. For example, when testing JND for weight perception using bags of rice, you might use a hypothesis that stipulates the JND will be a consistent percentage of the total weight - for instance, a 20% increase from the original weight.

In practical terms, if a one-pound bag of rice has a JND of 0.2 pounds (i.e., it is noticeably heavier when it's 1.2 pounds or more), then a 20-pound bag of rice would have a JND of 4 pounds (20% of 20 pounds) by the same hypothesis. Therefore, you would detect a difference if the 20-pound bag were increased to 24 pounds or more, but not if it were only increased to 22 or 23 pounds.

Answer 2

The correct answer is D. Just noticeable difference.

Explanation

In psychophysics, a barely noticeable difference, usually abbreviated with lowercase letters JND, is the smallest detectable difference between an initial and a secondary level of a particular sensory stimulus. Also known as limen difference, differential threshold, or less noticeable difference. According to the above, the correct answer is D. Just noticeable difference.