Sigmund of The Interpretation of Dreams; he was

Freud was a famous psychologist and publisher of The Interpretation of Dreams; he was the first one to suggest that
dreams may serve a particular scientific purpose (Bernstein).  Freud began to analyze dreams because he
thought that dreams had a connection to people’s personalities.  He also believed that dreams happened for a
reason, to preserve sleep.  In addition
Freud thought that dreams can reveal a person’s deepest unconscious wishes and
desires (McAndrew).  Freud’s theory
viewed all dreams as a form of wish fulfillment.  He recognized that the interpretation of
dreams was just a manifestation of the unconscious brain working at night.  Besides believing that dreams happened for a
reason, Freud believed in the displacement of dreams.  The displacement of dream content occurs when
the manifest content hardly resembles the actual meaning of the dream thought
(wiki).  He assumed that separate dreams
had the same meaning, however, the first dream was more distorted than the last

Jung strongly disagreed with Freud about the meaning or interpretation of
dreams.  Jung believed that dreams were
actually direct expressions of the mind itself and also believed that dreams
served two functions.  These functions
were to compensate for imbalances in the dreamers’ mind, body, and feelings and
to provide prospective images of the future (Bernstein).  He valued dreams so much since he assumed
that they were an important part of the development of a person’s personality,
also known as individuation.  Jung
thought that dreams were a form of compensation (West).  In addition, he suggested two basic
approaches for analyzing dreams, which were objective and subjective.  In the objective approach every person in the
dream refers to his or her own person. 
Then in the subjective approach every person in the dream represents an
aspect of the dreamer (wiki).  Jung felt
that everyone should analyze, meditate, and think about their dreams in order
to get something out of them.

Perls was a psychologist in the mid 1900s. 
He based his dream theories on gestalt theory, a holistic psychology
that focuses on the exact moment and seeing all sides of the situation or
problem (Klein).  Perls believed that
dreams are often ignored aspects of our personalities or daily problems that we
faced.  He did not believe that dreams
were a universal symbol; in the other hand he thought that each dream was
unique to the dreamer.  In addition,
Perls thought that by reacting our dreams we could understand its
significance.  He suggested some
strategies for understanding the meaning behind our dreams.  Some of the strategies are retelling the
dream in the present tense, reenact the dream, start a dialogue with each
character in the dream, and express how you felt toward each other (Dream
Moods).  By doing these strategies a
person will be able to reveal feelings and underlying issues that we were not
aware of before.