When using a _____ variable, subjects are _____ assigned to groups

Some theorists have proposed the existence of a stage of cognitive development beyond the highest level proposed by Piaget. This hypothesized level of thinking is referred to as _____ thought

a. private b. hypothetical c. postformal d. decontextualized

In 1968 an ad hoc committee of the Harvard Medical School recommended criteria for certifying death based on

a. a drop in blood pressure and pulse rate b. the presence of an irreversible coma c. an inability to speak and walk d. all of these e. none of these