Infants exhibit nonreflexive behaviors

The theorists who argue for a special mechanism approach to speech perception emphasize that humans have a special-purpose portion of the brain that makes speech perception easier. They call this special mechanism a

a. phonemic restoration unit. b. coarticulation device. c. phonetic module. d. categorical perception module.

Although a person may be at risk genetically for schizophrenia because it runs in his or her family, the person may not develop the illness unless environmental stress is high enough. This sounds very much like the description of

a. comorbidity. b. a biological marker. c. a stigma. d. the diathesis-stress hypothesis.