Thresholds and Sensation
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Flashcards about thresholds and sensation. Includes key terms, definitions and concepts.
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10 Terms
Psychophysics
The study of relationships between physical characteristics of a stimulus and the sensory capabilities to detect it.
Absolute Threshold
The minimum amount of physical energy needed in order to notice a stimulus.
Difference Threshold
The smallest difference between two stimuli that people can perceive 50% of the time, also known as JND.
Just Noticeable Difference (JND)
The smallest difference between two stimuli that people can perceive 50% of the time.
Weber's Law
The just noticeable difference is directly proportional to the magnitude of the stimulus.
Absolute threshold for vision
Observing a candle flame at around 50 kilometers away on a clear, dark night
Absolute threshold for hearing
The tick of a watch under quiet conditions at 6 metres away
Absolute threshold for taste
One teaspoon sugar in 7.5 litres of water
Absolute threshold for smell
One drop of perfume diffused in the entire volume of a large apartment
Absolute threshold for touch
The wing of a fly or bee falling on a person’s cheek from a distance of one centimetre
Note 
Flashcards (35)