According to your text, the most influential developmental psychologist of the 20th century was

a. Lev Vygotsky

According to the chapter Behavioral Treatment to Change Vocalization Patterns in a Person with

Schizophrenia, behavioral therapy techniques: (a) help schizophrenics deal with irrational beliefs (b) provide schizophrenics social support to help them handle the ups and downs of the disease (c) make heavy use of language to reason with schizophrenics (d) don't address cognitive processes at all

Rachel is visiting her friend Edith. Edith's mom gives each of the children a can of juice and a glass. Rachel's glass is a short, fat glass, and when she pours her juice into the glass she is convinced that Edith has more juice. Rachel would clearly be in the stage of cognitive development that Piaget named the:

a. sensorimotor period b. concrete operational period c. preoperational period d. formal operational period