To determine cause and effect relationships, researchers must use

Nora has had hearing defects since she was a child. She is now 43 and a new procedure to regenerate hair cells in the auditory canal has helped her to have those hearing defects corrected. What most likely occurred in Nora's brain as a result?

a) Not much; she was too old to have much brain plasticity. b) Areas of her brain involved in sound perception changed noticeably. c) Auditory signals were rerouted to the better functioning visual cortex. d) Broca's area had trouble interpreting all the new sounds.

Which of the following functions do stereotypes serve?

A) conserving cognitive effort B) providing ready interpretations for behavior C) providing different standards for evaluating members of different groups D) all of the above