The trichromatic and opponent process theories of color vision are not in conflict because each corresponds to ________________
a) a different portion of the spectrum
b) the opposite half of perceivable colors
c) one type of color blindness
d) a different stage of visual processing
ANS: D, The trichromatic theory is concerned with what happens when light hits the cones in the retina, whereas the opponent-process theory concerns neural signals on their way to the brain.
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Which of the following biological reasons explains women's increased resistance to infections and degenerative diseases?
lower cholesterol levels and improved lung function estrogen production and the additional X chromosome better osmoregulation and lower trans fat postmenopausal hormone levels and increased body water
In your ongoing quest to develop the best experiment, you decide to use a correlated-groups
design because this helps reduce error variability. Your colleague, however, recommends using an independent groups design because these use more degrees of freedom. Which design will most likely give you the largest test statistic, thereby making it easier to find a significant difference? A) independent, because more degrees of freedom increases the test statistic more than it's reduced by lowering error variability B) correlated, because the reducing error variability increases the test statistic more than it's reduced by the fewer degrees of freedom C) Both approaches will provide the same benefits. D) Neither, because the test statistic is not affected by degrees of freedom or error variability.