AP PSYCHOLOGY

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BIOLOGICAL BASES OF BEHAVIOR

BIOLOGY OF CONSCIOUSNESS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A researcher presents two lights of varying brightness to a subject who is asked to respond “same” or “different” by comparing their intensities. The researcher is seeking the
A
just noticeable difference.
B
absolute threshold.
C
subliminal threshold.
D
minimal threshold.
Explanation: 

Detailed explanation-1: -The point at which a change in sensory stimulation is detected is called the. just noticeable difference.

Detailed explanation-2: -Examples of Absolute Threshold Vision-A candle flame 30 miles away. Hearing-A watch ticking 20 feet away. Smell-A drop of perfume in a 6-room house. Taste-A teaspoon of sugar in a gallon of water.

Detailed explanation-3: -It is also possible for us to get messages that are presented below the threshold for conscious awareness-these are called subliminal messages. A stimulus reaches a physiological threshold when it is strong enough to excite sensory receptors and send nerve impulses to the brain: this is an absolute threshold.

Detailed explanation-4: -Psychophysics is the subfield of psychology devoted to the study of physical stimuli and their interaction with sensory systems. Psychophysical tasks have been extensively used to draw conclusions on how information is processed by the visual and other sensory systems.

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