hallucination
            
            
            
                
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        in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid, substantial, and located in external objective space.
Definition contributed by Anonymous
    
Definition contributed by Anonymous
Asserted relationships to other concepts
            hallucination
is a kind of
            
            
        is a kind of
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            hallucination
is a part of
            
            
        is a part of
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                are a kind of
                
hallucination
                
                
                    
        hallucination
No associations
                
        
                are a part of
                
hallucination
                
                
                    
hallucination
No associations
                
                
            Tasks that are asserted to measure hallucination
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