Classical conditioning is a behavioral training technique which begins with a naturally occurring stimulus eliciting an automatic response. Then, a previously neutral stimulus is paired with the naturally occurring stimulus.
Eventually, the previously neutral stimulus comes to evoke the response without the presence of the naturally occurring stimulus. The two elements are then known as the conditioned stimulus and the conditioned response.
Operant conditioning is a behavior training technique in which reinforcements or punishments are used to influence behavior. An association is made between a behavior and a consequence for that behavior.
In Freud’s psychoanalytic theory of personality, the unconscious mind is a reservoir of feelings, thoughts, urges, and memories that are outside of our conscious awareness. Most of the contents of the unconscious are unacceptable or unpleasant, such as feelings of pain, anxiety, or conflict.
According to Freud, the unconscious mind continues to influence our behavior and experiences, even though we are unaware of these underlying influences.