A sensory experience that occurs in the absence of corresponding external stimulation, experienced as real, characterizes a core concept within psychological study. This perception lacks an objective source, differing from illusions, which are misinterpretations of actual sensory input. For example, an individual might hear voices when no one is speaking, or see objects that are not physically present.
Understanding this phenomenon is vital in the diagnosis and treatment of various mental health conditions, including schizophrenia, bipolar disorder, and certain neurological disorders. Historically, its manifestation has been attributed to diverse factors, ranging from spiritual possession to physiological imbalances. Recognizing the diverse potential etiologiesspanning psychological, neurological, and substance-induced causesallows for more effective intervention strategies.
