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A delusion [a] is a false fixed belief that is not amenable to change in light of conflicting evidence. [2] As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, hallucination, or some other misleading effects of perception, as individuals with those beliefs are able to change or readjust their beliefs upon reviewing the evidence.
The delusion, if acted out, often leads to behaviors which are abnormal, and out of character, although perhaps understandable in light of the delusional beliefs. Other people who know the individual observe that the belief and behavior are uncharacteristic and alien. Additional characteristic of delusional disorder include the following: [17]
A thought disorder (TD) is a disturbance in cognition which affects language, thought and communication. [1] [2] Psychiatric and psychological glossaries in 2015 and 2017 identified thought disorders as encompassing poverty of ideas, neologisms, paralogia (a reasoning disorder characterized by expression of illogical or delusional thoughts), word salad, and delusions—all disturbances of ...
However, similar delusional beliefs, often singularly or more rarely reported, are sometimes also considered to be part of the delusional misidentification syndrome. For example: Mirrored-self misidentification is the belief that one's reflection in a mirror is some other person.
Delusions are "abnormal beliefs" and may be bizarre (considered impossible to be true), or non-bizarre (possible, but considered by the clinician as highly improbable). Beliefs about being poisoned, being followed, marital infidelity or a conspiracy in the workplace are examples of non-bizarre beliefs that may be considered delusions. [ 3 ]
Psychosis may involve delusional beliefs. A delusion is a fixed, false idiosyncratic belief, which does not change even when presented with incontrovertible evidence to the contrary. Delusions are context- and culture-dependent: a belief that inhibits critical functioning and is widely considered delusional in one population may be common (and ...
Persecutory delusions are persistent, distressing beliefs that one is being or will be harmed, that continue even when evidence of the contrary is presented. This condition is often seen in disorders like schizophrenia , schizoaffective disorder , delusional disorder , manic episodes of bipolar disorder , psychotic depression , and some ...
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