When brett was only six years old, his older sister hid in his closet, then unexpectedly jumped out and scared him when he came into his dark bedroom. brett is still terrified of the dark even as an adult. based on principles of classical conditioning, what is brett’s fear of the dark? a. a result of counterconditioningb. an unconditioned responsec. a conditioned responsed. a result of observational learning

C) A conditioned response.

Explanation: Conditional response arise from experience. The subject is exposed to the conditional stimulus (not natural) and responds in a certain way. From experience, therefore, learning arises. A conditional response can be, for example, the fear of the dark, one man does not born with this fear, however a bad experience can trigger it.

there are treatment options for depression (mdd) that may work for you. one way of treating depression may be to affect the levels of certain chemicals that brain cells use to communicate, called neurotransmitters. scientists believe that certain neurotransmitters may be out of balance in depression.

although the exact way depression medications shown to ease overall depression symptoms in some people work is unknown, scientists think that some medications work by affecting the levels of a neurotransmitter called serotonin in the brain. other treatments work by affecting the levels of other neurotransmitters like norepinephrine or dopamine.