Psychological Signs and Symptoms

Symptoms are the patient’s complaints. They are highly subjective and amenable to suggestion and to alterations in the patient’s mood and other mental processes. Symptoms are no more than mere indications. Signs, on the other hand, are objective and measurable. Signs are evidence of the existence, stage, and extent of a pathological state. Headache is a symptom – short-sightedness (which may well be the cause of the headache) is a sign.

Psychological Defense Mechanisms

According to Freud and his followers, our psyche is a battlefield between instinctual urges and drives (the id), the constraints imposed by reality on the gratification of these impulses (the ego), and the norms of society (the superego). This constant infighting generates what Freud called “neurotic anxiety” (fear of losing control) and “moral anxiety” (guilt and shame).

Psychological Tests

The outcomes of various tests must fit in with each other. Put together, they must provide a consistent and coherent picture. If one test yields readings that are constantly at odds with the conclusions of other questionnaires or interviews, it may not be valid. In other words, it may not be measuring what it claims to be measuring.