People with schizophrenia who wave their arms around in wild motions and make kicking motions with their legs are experiencing: a. catatonic rigidity. b. catatonic posturing. c. catatonic stupor. d. catatonic excitement.

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities