An incomplete protein contains fewer than all nine essential amino acids, however incomplete proteins can be combined in meals to make a complete protein (for example by combining rice and beans or peanut butter and toast).
Psychology is the study of behavior and mind, embracing all aspects of conscious and unconscious experience as well as thought. It is an academic discipline and an applied science which seeks to understand individuals and groups by establishing general principles and researching specific cases.
Psychology is the study of human thought, emotion and behavior. Someone who is trained in this discipline is called a psychologist and he or she has a variety of options from which to choose when deciding on an area of specialization. The most popular areas are clinical, counseling and school psychology.