Arjean is terribly gullible and accepts as true just about anything she is told. According to the psychoanalytic perspective, Arjean is most likely fixated at the ________ stage.

What determines whether a baby will be a boy?

a) if the father contributes a Y chromosome b) if the father contributes an X chromosome c) if the mother contributes a Y chromosome d) if the mother contributes an X chromosome

On a variable-ratio schedule, reinforcement is given for the ______

a. first correct response after a fixed amount of time has passed b. first correct response after varying amounts of time have passed c. next correct response after a fixed number of responses have occurred d. next correct response after a varying number of responses have occurred