A man's sex drive is related to the amount of which of the following supplied by his testes?

Despite changes in the size of the retinal image, the same object viewed near and far does

not appear to grow larger and smaller. This perceptual principle is known as a. distance relativity. b. distance constancy. c. size relativity. d. size constancy. e. depth invariance.

Before an infant has understood the idea of ____________, he will not search for an object that has been hidden right before his eyes

a. object stability c. object permanence b. object mobility d. object constancy