According to Fechner, the effects of stimulus intensities are not ____ but are ____ to the amount of sensation that already exists.?

When levels of testosterone in the bloodstream increase, performance on:

a. verbal tasks generally improves b. verbal tasks generally declines c. spatial tasks generally improves d. spatial tasks generally declines

The fact that roses have a distinctive and similar fragrance regardless of where they are found is explained by the fact that

a. they produce molecules of similar shape that match the olfactory receptors. b. the airborne molecules activate the vestibular receptors for the floral fragrances. c. they produce similar numbers of gaseous molecules. d. the floral smell of roses is one of the four primary scents.