Questions and Answers
The difference threshold is also known as what?
just noticeable difference (jnd)
What is the difference threshold?
The minimum difference between two stimuli required for detection 50 percent of the time.
The detectable difference increases with what?
The size of the stimulus
What is Weber's law?
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For the average person to perceive their differences, two lights must vary in intensity by what percent?
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For the average person to perceive their differences, objects must differ in weight by what percent?
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For the average person to perceive their differences, two tones must differ in frequency by what percent?
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Study Notes
Difference Thresholds
- The difference threshold, also referred to as the "just noticeable difference" (jnd).
- Defines the minimum difference needed between two stimuli for detection 50% of the time.
- Experienced as the just noticeable difference in everyday perception.
Influencing Factors
- The detectable difference in stimuli increases with the size of the stimulus.
- Larger stimuli require a greater difference for the change to be noticed.
Weber's Law
- Weber's Law states that for two stimuli to be perceived as different, they must differ by a constant minimum percentage (proportion) rather than a fixed amount.
- This principle emphasizes the relative nature of sensory perception.
Specific Percentage Thresholds
- For light intensity differences, the average person perceives a difference at an intensity change of 8%.
- For weight differences, the average person can perceive a change when the weight differs by 2%.
- For sound frequency differences, a change of only 0.3% is necessary for the average person to perceive a difference.
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Description
Test your knowledge on the concept of difference thresholds through this flashcard quiz. Learn about the just noticeable difference, its definition, and how it varies with stimulus size. Perfect for students of psychology looking to reinforce their understanding of sensory perception.
