Which Roman physician took up the theories of Hippocrates and extended them with a theory that normal brain functioning is related to a proper balance of four bodily fluids of humors?

According to Carl Rogers, what are a therapist's two main directives?

A. To help the client perceive his own thoughts and feelings without the therapist seeking to change them in any way. B. To help the client discover the roots of their anxieties and emotional difficulties. C. To make the client feel appreciated no matter what he thinks, says, or does. D. a and c.

Sid is taking part in research on the effects of sleep deprivation; he has been without sleep for 75 hours. Right now researchers have asked him to sit in front of a computer screen and hit a button each time he sees the letter "S" on the screen

A few days ago, Sid was a whiz at this task; however, he is doing very poorly today. How would sleep researchers explain Sid's poor performance? a) Due to the sleep deprivation, Sid does not understand the task. b) Microsleeps are occurring due to the sleep deprivation and he is asleep for brief periods of time. c) He is determined to ruin the research because of the suffering he is enduring at the hands of the researchers. d) He is probably dreaming that he is somewhere else and has no interest in responding to the "here and now."