Here I will give a brief overview of the psychoanalytic viewpoint of development. This viewpoint was very important to the study of psychology as it shone a light on the importance of the unconscious mind. First, I will focus on the original psychoanalytical theory - the Psychosexual Theory - laid out by none other than Sigmund Freud. Next, I will describe Freud's successor, Eric Erikson's Psychosocial Theory. Both of these theories have had a major impact on the field of developmental psychology; however, please bare in mind that these theories are very outdated and are hardly falsifiable (they are hard to (dis)confirm as they are difficult to test - other than through the use of self-reports).
Other major contributors to the area of psychoanalytics are Horney, Sullivan, Adler, etc.
For Freud's Psychosexual Theory click here.
For Erikson's Psychosocial Theory click here.