In Pavlov's experiments, a sound preceded food, which evoked salivation. We refer to the sound as the ______ stimulus

According to the DSM-5, a major depressive episode is a period marked by at least ____ symptoms of depressed and lasting for _____ weeks or more.

a.) Six; two b.) Five; three c.) Five; two d.) Six; six

Which of the following is an anxiety disorder?

a) bipolar disorder b) conversion disorder c) a specific phobia d) schizophrenia