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Lecture 8

PSYC 100 Lecture Notes - Lecture 8: Detection Theory, Absolute Threshold, Response Bias

Course Code
PSYC 100
Jordan Poppenk

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Sensation and Perception
Sensation- receptors turn physical clues into action potentials (electricity)
Perception- The brain then turns the electricity into ideas
Transduction- receptors transform stimuli into neural impulses
Doctrine of specific nerve energies- different senses are separated in the brain
Sensory adaptation- reduction of activity in sensory receptors after repeated exposure to a
- Sight
- Hearing
- Taste
- Smell
- Touch
- Body awareness
- Balance
Noticeable Differences
Difference threshold (just noticeable difference)- difference just large enough to be noticed
half the time
Weber’s Law: Fechner’s Law:
Absolute threshold- smallest level of energy required by an external stimulus to be detectable
by the human senses
Signal detection theory- measuring how well you distinguish between targets and lures
- Lure- no stimulus
- Target- Stimulus
Response bias- participants respond inaccurately or falsely to questions
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