J. O. Johannessen

971 total citations
13 papers, 740 citations indexed

About

J. O. Johannessen is a scholar working on Psychiatry and Mental health, Clinical Psychology and Philosophy. According to data from OpenAlex, J. O. Johannessen has authored 13 papers receiving a total of 740 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Psychiatry and Mental health, 8 papers in Clinical Psychology and 8 papers in Philosophy. Recurrent topics in J. O. Johannessen's work include Schizophrenia research and treatment (11 papers), Mental Health and Psychiatry (8 papers) and Mental Health Treatment and Access (4 papers). J. O. Johannessen is often cited by papers focused on Schizophrenia research and treatment (11 papers), Mental Health and Psychiatry (8 papers) and Mental Health Treatment and Access (4 papers). J. O. Johannessen collaborates with scholars based in Norway, United States and Denmark. J. O. Johannessen's co-authors include Tor Ketil Larsen, Stein Opjordsmoen, Ingrid Melle, Svein Friis, Erik Simonsen, Ulrik Haahr, Per Vaglum, Thomas H. McGlashan, Bjørn Rishovd Rund and Inge Joa and has published in prestigious journals such as The British Journal of Psychiatry, Schizophrenia Bulletin and The Journal of Nervous and Mental Disease.

In The Last Decade

J. O. Johannessen

12 papers receiving 701 citations

Peers

Countries citing papers authored by J. O. Johannessen

Since Specialization

Citations

This map shows the geographic impact of J. O. Johannessen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J. O. Johannessen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. O. Johannessen more than expected).

Fields of papers citing papers by J. O. Johannessen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. O. Johannessen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J. O. Johannessen. The network helps show where J. O. Johannessen may publish in the future.

Co-authorship network of co-authors of J. O. Johannessen

This figure shows the co-authorship network connecting the top 25 collaborators of J. O. Johannessen. A scholar is included among the top collaborators of J. O. Johannessen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J. O. Johannessen. J. O. Johannessen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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13 of 13 papers shown

#	Work	Indexed citations
1	The TIPS family psychoeducational group work approach in first episode psychosis and related disorders: 25 years of experiences 2024 ·Early Intervention in Psychiatry ·Johannes Langeveld, (unknown), Wenche ten Velden Hegelstad, J. O. Johannessen, Inge Joa	2
2	Are multi family groups appropriate for patients with first episode psychosis? A 5‐year naturalistic follow‐up study 2010 ·Acta Psychiatrica Scandinavica ·Jan Ivar Røssberg, J. O. Johannessen, Ole Klungsøyr, Stein Opjordsmoen, Julie Evensen, (unknown), Ulrik Haahr, Inge Joa, Johannes Langeveld, Tor Ketil Larsen, Ingrid Melle, Bjørn Rishovd Rund, Erik Simonsen, (unknown), Per Vaglum, Svein Friis, T. H. McGlashan	19
3	A 2‐year follow‐up of involuntary admission’s influence upon adherence and outcome in first‐episode psychosis 2010 ·Acta Psychiatrica Scandinavica ·Stein Opjordsmoen, Svein Friis, Ingrid Melle, Ulrik Haahr, J. O. Johannessen, Tor Ketil Larsen, Jan Ivar Røssberg, Bjørn Rishovd Rund, Erik Simonsen, Per Vaglum, T. H. McGlashan	47
4	The Development of Subjective Quality of Life Over the First 2 Years in First-Episode Psychosis 2010 ·The Journal of Nervous and Mental Disease ·Ingrid Melle, Jan Ivar Røssberg, Inge Joa, Svein Friis, Ulrik Haahr, J. O. Johannessen, Tor Ketil Larsen, Stein Opjordsmoen, Bjørn Rishovd Rund, Erik Simonsen, Per Vaglum, Thomas H. McGlashan	21
5	Clinical epidemiologic first‐episode psychosis: 1‐year outcome and predictors 2007 ·Acta Psychiatrica Scandinavica ·Erik Simonsen, Svein Friis, Ulrik Haahr, J. O. Johannessen, Tor Ketil Larsen, Ingrid Melle, Stein Opjordsmoen, Bjørn Rishovd Rund, Per Vaglum, Thomas H. McGlashan	65
6	Innovations: Psychoeducation: Multifamily Group Treatment in a Program for Patients With First-Episode Psychosis: Experiences From the TIPS Project 2007 ·Psychiatric Services ·(unknown), (unknown), Svein Friis, J. O. Johannessen, Tor Ketil Larsen, (unknown), (unknown), Ingrid Melle, Erik Simonsen, Nina Aarhus Smeby, (unknown), William R. McFarlane, Per Vaglum, Thomas H. McGlashan	17
7	Early Detection of First-Episode Psychosis: The Effect on 1-Year Outcome 2005 ·Schizophrenia Bulletin ·Tor Ketil Larsen, Ingrid Melle, B. Auestad, Svein Friis, Ulrik Haahr, J. O. Johannessen, Stein Opjordsmoen, Bjørn Rishovd Rund, Erik Simonsen, Per Vaglum, Thomas H. McGlashan	82
8	Reducing the duration of untreated first‐episode psychosis – effects on baseline social functioning and quality of life 2005 ·Acta Psychiatrica Scandinavica ·Ingrid Melle, Ulrik Haahr, Svein Friis, (unknown), J. O. Johannessen, Tor Ketil Larsen, Stein Opjordsmoen, Bjørn Rishovd Rund, Erik Simonsen, Per Vaglum, Thomas H. McGlashan	42
9	Does duration of untreated psychosis bias study samples of first‐episode psychosis? 2004 ·Acta Psychiatrica Scandinavica ·Svein Friis, Ingrid Melle, Tor Ketil Larsen, Ulrik Haahr, J. O. Johannessen, Erik Simonsen, Stein Opjordsmoen, Per Vaglum, Thomas H. McGlashan	38
10	Methodological pitfalls in early detection studies – the NAPE Lecture 2002 2003 ·Acta Psychiatrica Scandinavica ·Svein Friis, Tor Ketil Larsen, Ingrid Melle, Stein Opjordsmoen, J. O. Johannessen, Ulrik Haahr, Erik Simonsen, Bjørn Rishovd Rund, Per Vaglum, Thomas H. McGlashan	80
11	Early detection and intervention in first‐episode schizophrenia: a critical review 2001 ·Acta Psychiatrica Scandinavica ·Tor Ketil Larsen, Svein Friis, Ulrik Haahr, Inge Joa, J. O. Johannessen, Ingrid Melle, Stein Opjordsmoen, Erik Simonsen, Per Vaglum	165
12	[Relapse as quality indicator in psychiatric treatment]. 2000 ·PubMed ·J. O. Johannessen, Tor Ketil Larsen	0
13	First-episode schizophrenia with long duration of untreated psychosis: Pathways to care 1998 ·The British Journal of Psychiatry ·Tor Ketil Larsen, J. O. Johannessen, Stein Opjordsmoen	162

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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