Journal Article


Robert Dudley
Gary Donohoe
John L Waddington
F Anthony O Neill
Kieran C Murphy
Timothy G Dinan
Derek W Morris
Michael Gill
Aiden Corvin
David Smailes
and 1 others



ireland spectrum disorders people hallucinations patients prevalence models theoretical schizophrenia and disorders

Occurrence and co-occurrence of hallucinations by modality in schizophrenia-spectrum disorders. (2016)

Abstract It is not only unclear why hallucinations in schizophrenia occur with different prevalence by modality, but also to what extent they do. Reliable prevalence estimates of hallucinations by modality in schizophrenia are currently lacking, particularly for non-auditory hallucinations. Studies have also tended to report lifetime, not point prevalence by modality. This study assessed the prevalence and co-occurrence of hallucinations, for both lifetime and point prevalence, across the auditory, visual, olfactory, and tactile modalities, in people diagnosed with chronic schizophrenia-spectrum disorders in Ireland (N=693) and Australia (N=218). Lifetime prevalence was 64-80% auditory, 23-31% visual, 9-19% tactile, and 6-10% olfactory. Past month prevalence was 23-27% auditory, 5-8% visual, 4-7% tactile, and 2% olfactory. The majority of participants had only hallucinated in one modality, with this nearly always being the auditory. Approximately one-third had hallucinated in two modalities, most commonly the auditory and visual. Most currently hallucinating patients also hallucinated in a single modality, again, nearly always the auditory. Whereas 30-37% of patients with lifetime auditory hallucinations had experienced visual hallucinations, 83-97% of patients with experience of visual hallucinations had experienced auditory hallucinations. These findings help delineate the modality distribution of hallucinations in schizophrenia, and provide an explanatory target for theoretical models.
Collections Ireland -> National University of Ireland Galway -> PubMed

Full list of authors on original publication

Robert Dudley, Gary Donohoe, John L Waddington, F Anthony O Neill, Kieran C Murphy, Timothy G Dinan, Derek W Morris, Michael Gill, Aiden Corvin, David Smailes and 1 others

Experts in our system

Gary Donohoe
Trinity College Dublin
Total Publications: 130
Kieran C Murphy
Royal College of Surgeons in Ireland
Total Publications: 25
Derek Morris
Trinity College Dublin
Total Publications: 150
Michael Gill
Trinity College Dublin
Total Publications: 260
Aiden Corvin
Trinity College Dublin
Total Publications: 190