The process of maintaining clear retinal images in varying light conditions is

According to your textbook, subliminal advertising:

A) is a form of "mind control." B) can lead people to purchase items they otherwise would not. C) at most can have only a very temporary effect on thought. D) are pointless, because humans are not affected by subliminal stimuli.

In middle childhood, many deaf children of hearing parents achieve poorly in school, are deficient in social skills, and display impulse-control problems. Meanwhile, deaf children of deaf parents escape these difficulties

This is likely because hearing parents A) lack experience with visual communication. B) often become frustrated and give up on exerting any control over their deaf children. C) usually do not benefit from social support and training in how to interact with their nonhearing children. D) do not have access to medical services for children with special needs.