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13 Cards in this Set
- Front
- Back
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selective attention |
the focusing of conscious awareness on a particular stimulus |
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inattentional blindness |
failing to see visible objects when our attention is directed elsewhere |
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change blidness |
failing to notice changes in the environment |
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psychophysics |
the study of relationships between the physical characteristics of stimuli, such as their intensity and our psychological experience of them |
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absolute threshold |
the minimum stimulation needed to detect a particular stimulus 50% of the time |
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signal detection theory |
a theory predicting how and when we detect the presence of a faint stimuli and background stimulation. Assumes there is no single absolute threshold and that detection depends partially on person's experiences, expectations, motivations, and alertness |
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subliminal threshold |
when stimuli are below one's absolute threshold for conscious awareness |
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priming |
the activation, often unconsciously, of certain associations, thus predisposing one's perception, memory, or response |
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difference threshold |
the minimum difference between to stimuli required for detection 50% of the time. We experience the difference threshold as a just noticeable difference |
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weber's law |
two stimuli must differ by a constnt minimum percentage (rather than a constant amount) to be percieved as different |
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sensory adaptation |
diminished sensitivity as a consequence of constant stimulation |
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transduction |
conversation of one form of energy to another. In sensation, the transforming stimulus energies, such as sights, sounds, and smells, into neural impulses our brains can interpret |
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wavelength |
the distance from the peak of one light or souund wave to the peak of the next. Electromagnetic wavelengths vary from short blips of cosmic rays to the long pulses of radio transmission |
