Which of the following statements best illustrates Weber's law in the context of stress perception?

• A. A person feels equally stressed whether they have one or multiple tasks to complete.
• B. A person experiences more stress when they are hungry than when they are full.
• C. A person always notices any change in their environment, regardless of how small.
• D. A person notices the difference between carrying a 1 kg and a 2 kg weight, but does not notice the difference between carrying a 50 kg and a 51 kg weight.

Answer: (D)

Verified step by step guidance

1. Step 1: Understand Weber's Law, which states that the just noticeable difference (JND) between two stimuli is proportional to the magnitude of the original stimulus. This means that the ability to detect a change depends on the relative difference, not the absolute difference.
2. Step 2: Identify that Weber's Law applies to perception, including sensory experiences like weight, brightness, or stress levels, where larger baseline stimuli require larger changes to be noticed.
3. Step 3: Analyze each statement to see if it reflects this proportional relationship. For example, noticing the difference between 1 kg and 2 kg (a 100% increase) but not between 50 kg and 51 kg (only a 2% increase) aligns with Weber's Law.
4. Step 4: Recognize that statements about equal stress regardless of task number or always noticing any change do not reflect the proportional sensitivity described by Weber's Law.
5. Step 5: Conclude that the statement illustrating Weber's Law is the one describing the difference in weight perception, as it demonstrates that the perception of change depends on the relative size of the change compared to the original stimulus.