Glossary of Psych Ch. 6 section 1

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detecting physical energy from the environment and encoding it as neural signals
selecting, organizing, and interpreting our sensations
conversion of one form of energy into another. In sensation, the transformation of stimulus energies into neural impulses
Receptor cells
a neuron that directly responds to a physical stimulus.
Anatomical coding
interpreting the location and type of stimulus according to which incoming nerve fibers are active
Temporal Coding
which system (eyes/ears) and which receptor cells in each system
Weber fractions
to be perceived as different, two stimuli must differ by a certain percentage and not a certain amount
study of how physical energy relates to our physical senses
Just-noticeable difference
the minimum difference a person can detect between any two stimuli half the time
a point at which a stimulus, or a change of intensity of a stimulus can just be detected
Absolute threshold
minimum stimulation required to detect a particular stimulus.
Signal detection theory
when we will detect weak signals, measured by our ration to miss and hits. When our bias comes in.
ROC curve
a graph of hits or false alarms of a patient. Indicates peoples ability to dtect certain stimulus

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