The idea that the threshold for sensing a stimulus depends not only on the properties of the stimulus itself but on the level of background stimulation, as well as characteristics of the perceiver, is explained by
a. Weber's Law.
b. the volley principle.
c. opponent-process theory. d. signal-detection theory.
e. sensory adaptation.
d
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__________are parents who generally leave their children to themselves
A) Uninvolved parents B) Authoritative parents C) Authoritarian parents D) Doting parents E) Select
The opponent-process theory of color vision describes _________
a. how ganglion cells code color information. b. the way cones respond to different colors. c. the way rods respond to different colors. d. how color processing in the fovea is coded differently than in the periphery.
Evelyn's husband recently died and she is supporting her two children. In addition, she is struggling to keep her job and has taken an increased workload. Based on what you know about stress, Evelyn is most likely to
A. have more colds and other respiratory infections. B. show enhanced immune system activity. C. show an increase in natural killer cell activity. D. have decreased cortisol secretion.
In the human brain, about how many neurons use serotonin as their primary neurochemical?
A. 200,000 B. 1 million C. 200 million D. 1 billion