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Dysphoria Dysphoria is a psychological state that causes someone to experience feelings of anxiety, restlessness, and depression. This is not necessarily a…

Dyad The presence of two entities. For example, two people, two animals, etc. Some have argued that a dyad can be considered…

Dualism Dualism is the presumption proposed by Descartes that the human mind and body are two distinct entities that interact with each…

DSM-5 DSM-5 stands for the title of the book, Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition). This book is published…

DSM The American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders is a system used for classifying psychological disorders. This is…

Drive Reduction Theory How do you know when it is time to get a glass of water? You know because you get…

Drive An aroused state of psychological tension that typically arises from a need. A drive, such as hunger or thirst, motivates the…

Down Syndrome Down syndrome is a condition of mental retardation and associated physical disorders caused by an extra chromosome. Each person has…

Double-Blind Procedure This is one type of experimental procedure in which both the patient and the staff are ignorant (blind) as to…

Double Dissociation Double Dissociation is when two related mental processes are shown to function independently of each other. A classic example of…